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Finding the Fourth Proportional to 624,615.92, 861,962.82 and 338,129.72

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Solution

The fourth proportional to 624,615.92, 861,962.82 and 338,129.72 is: 466,615.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,615.92 : 861,962.82 = 338,129.72 : x
  2. Step 2: Convert to fraction form
    624,615.92/861,962.82 = 338,129.72/x
  3. Step 3: Cross multiply
    624,615.92x = 861,962.82 × 338,129.72
  4. Step 4: Simplify right side
    624,615.92x = 291,455,246,977.01
  5. Step 5: Solve for x
    x = 291,455,246,977.01/624,615.92
  6. Step 6: Final answer
    x = 466,615.14

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1.5x scale

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.