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Finding the Fourth Proportional to 629,856,613.60, 944,784,920.40 and 435,713,999.20

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Solution

The fourth proportional to 629,856,613.60, 944,784,920.40 and 435,713,999.20 is: 653,570,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,856,613.60 : 944,784,920.40 = 435,713,999.20 : x
  2. Step 2: Convert to fraction form
    629,856,613.60/944,784,920.40 = 435,713,999.20/x
  3. Step 3: Cross multiply
    629,856,613.60x = 944,784,920.40 × 435,713,999.20
  4. Step 4: Simplify right side
    629,856,613.60x = 411,656,016,051,337,664
  5. Step 5: Solve for x
    x = 411,656,016,051,337,664/629,856,613.60
  6. Step 6: Final answer
    x = 653,570,998.80

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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.