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Finding the Fourth Proportional to 625,192.16, 862,764 and 338,720

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Solution

The fourth proportional to 625,192.16, 862,764 and 338,720 is: 467,432.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,192.16 : 862,764 = 338,720 : x
  2. Step 2: Convert to fraction form
    625,192.16/862,764 = 338,720/x
  3. Step 3: Cross multiply
    625,192.16x = 862,764 × 338,720
  4. Step 4: Simplify right side
    625,192.16x = 292,235,422,080
  5. Step 5: Solve for x
    x = 292,235,422,080/625,192.16
  6. Step 6: Final answer
    x = 467,432.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.