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Finding the Fourth Proportional to 19,315,657,813.60, 28,973,486,720.40 and 19,315,657,813.60

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Solution

The fourth proportional to 19,315,657,813.60, 28,973,486,720.40 and 19,315,657,813.60 is: 28,973,486,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,315,657,813.60 : 28,973,486,720.40 = 19,315,657,813.60 : x
  2. Step 2: Convert to fraction form
    19,315,657,813.60/28,973,486,720.40 = 19,315,657,813.60/x
  3. Step 3: Cross multiply
    19,315,657,813.60x = 28,973,486,720.40 × 19,315,657,813.60
  4. Step 4: Simplify right side
    19,315,657,813.60x = 559,641,955,158,130,098,176
  5. Step 5: Solve for x
    x = 559,641,955,158,130,098,176/19,315,657,813.60
  6. Step 6: Final answer
    x = 28,973,486,720.40

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Double scale
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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.