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Finding the Fourth Proportional to 625,163.88, 862,721.37 and 338,681.91

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Solution

The fourth proportional to 625,163.88, 862,721.37 and 338,681.91 is: 467,378.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,163.88 : 862,721.37 = 338,681.91 : x
  2. Step 2: Convert to fraction form
    625,163.88/862,721.37 = 338,681.91/x
  3. Step 3: Cross multiply
    625,163.88x = 862,721.37 × 338,681.91
  4. Step 4: Simplify right side
    625,163.88x = 292,188,121,389.42
  5. Step 5: Solve for x
    x = 292,188,121,389.42/625,163.88
  6. Step 6: Final answer
    x = 467,378.44

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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.