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Finding the Fourth Proportional to 625,109.13, 862,649.82 and 338,630.40

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Solution

The fourth proportional to 625,109.13, 862,649.82 and 338,630.40 is: 467,309.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,109.13 : 862,649.82 = 338,630.40 : x
  2. Step 2: Convert to fraction form
    625,109.13/862,649.82 = 338,630.40/x
  3. Step 3: Cross multiply
    625,109.13x = 862,649.82 × 338,630.40
  4. Step 4: Simplify right side
    625,109.13x = 292,119,453,606.53
  5. Step 5: Solve for x
    x = 292,119,453,606.53/625,109.13
  6. Step 6: Final answer
    x = 467,309.53

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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.