Home / 515,899.40-773,849.10-389,928.20

Finding the Fourth Proportional to 515,899.40, 773,849.10 and 389,928.20

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Solution

The fourth proportional to 515,899.40, 773,849.10 and 389,928.20 is: 584,892.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,899.40 : 773,849.10 = 389,928.20 : x
  2. Step 2: Convert to fraction form
    515,899.40/773,849.10 = 389,928.20/x
  3. Step 3: Cross multiply
    515,899.40x = 773,849.10 × 389,928.20
  4. Step 4: Simplify right side
    515,899.40x = 301,745,586,634.62
  5. Step 5: Solve for x
    x = 301,745,586,634.62/515,899.40
  6. Step 6: Final answer
    x = 584,892.30

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.