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Finding the Fourth Proportional to 624,620.49, 861,976.58 and 338,140.58

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Solution

The fourth proportional to 624,620.49, 861,976.58 and 338,140.58 is: 466,634.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,620.49 : 861,976.58 = 338,140.58 : x
  2. Step 2: Convert to fraction form
    624,620.49/861,976.58 = 338,140.58/x
  3. Step 3: Cross multiply
    624,620.49x = 861,976.58 × 338,140.58
  4. Step 4: Simplify right side
    624,620.49x = 291,469,254,707.03
  5. Step 5: Solve for x
    x = 291,469,254,707.03/624,620.49
  6. Step 6: Final answer
    x = 466,634.16

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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.