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Finding the Fourth Proportional to 1,189,698,426.55, 1,641,820,784.43 and 653,840,368.30

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Solution

The fourth proportional to 1,189,698,426.55, 1,641,820,784.43 and 653,840,368.30 is: 902,320,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,698,426.55 : 1,641,820,784.43 = 653,840,368.30 : x
  2. Step 2: Convert to fraction form
    1,189,698,426.55/1,641,820,784.43 = 653,840,368.30/x
  3. Step 3: Cross multiply
    1,189,698,426.55x = 1,641,820,784.43 × 653,840,368.30
  4. Step 4: Simplify right side
    1,189,698,426.55x = 1,073,488,706,374,306,048
  5. Step 5: Solve for x
    x = 1,073,488,706,374,306,048/1,189,698,426.55
  6. Step 6: Final answer
    x = 902,320,018.60

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Half scale
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Double scale
Find fourth proportional to 1,189,698,427.55, 1,641,820,785.81 and 653,840,369.30
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.