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Finding the Fourth Proportional to 679,964,913.20, 1,019,947,369.80 and 625,545,354.80

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Solution

The fourth proportional to 679,964,913.20, 1,019,947,369.80 and 625,545,354.80 is: 938,318,032.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,964,913.20 : 1,019,947,369.80 = 625,545,354.80 : x
  2. Step 2: Convert to fraction form
    679,964,913.20/1,019,947,369.80 = 625,545,354.80/x
  3. Step 3: Cross multiply
    679,964,913.20x = 1,019,947,369.80 × 625,545,354.80
  4. Step 4: Simplify right side
    679,964,913.20x = 638,023,339,318,867,712
  5. Step 5: Solve for x
    x = 638,023,339,318,867,712/679,964,913.20
  6. Step 6: Final answer
    x = 938,318,032.20

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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.