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Finding the Fourth Proportional to 625,341,728.25, 938,012,621.54 and 428,410,951.29

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Solution

The fourth proportional to 625,341,728.25, 938,012,621.54 and 428,410,951.29 is: 642,616,446.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,341,728.25 : 938,012,621.54 = 428,410,951.29 : x
  2. Step 2: Convert to fraction form
    625,341,728.25/938,012,621.54 = 428,410,951.29/x
  3. Step 3: Cross multiply
    625,341,728.25x = 938,012,621.54 × 428,410,951.29
  4. Step 4: Simplify right side
    625,341,728.25x = 401,854,879,513,836,096
  5. Step 5: Solve for x
    x = 401,854,879,513,836,096/625,341,728.25
  6. Step 6: Final answer
    x = 642,616,446.91

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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.