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Finding the Fourth Proportional to 539,136,636.60, 808,704,954.90 and 431,641,212.60

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Solution

The fourth proportional to 539,136,636.60, 808,704,954.90 and 431,641,212.60 is: 647,461,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,136,636.60 : 808,704,954.90 = 431,641,212.60 : x
  2. Step 2: Convert to fraction form
    539,136,636.60/808,704,954.90 = 431,641,212.60/x
  3. Step 3: Cross multiply
    539,136,636.60x = 808,704,954.90 × 431,641,212.60
  4. Step 4: Simplify right side
    539,136,636.60x = 349,070,387,368,664,320
  5. Step 5: Solve for x
    x = 349,070,387,368,664,320/539,136,636.60
  6. Step 6: Final answer
    x = 647,461,818.90

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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.