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Finding the Fourth Proportional to 625,262.16, 862,860.60 and 338,790

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Solution

The fourth proportional to 625,262.16, 862,860.60 and 338,790 is: 467,529.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,262.16 : 862,860.60 = 338,790 : x
  2. Step 2: Convert to fraction form
    625,262.16/862,860.60 = 338,790/x
  3. Step 3: Cross multiply
    625,262.16x = 862,860.60 × 338,790
  4. Step 4: Simplify right side
    625,262.16x = 292,328,542,674
  5. Step 5: Solve for x
    x = 292,328,542,674/625,262.16
  6. Step 6: Final answer
    x = 467,529.56

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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.