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Finding the Fourth Proportional to 624,612.54, 861,965.16 and 338,132.40

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Solution

The fourth proportional to 624,612.54, 861,965.16 and 338,132.40 is: 466,622.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,612.54 : 861,965.16 = 338,132.40 : x
  2. Step 2: Convert to fraction form
    624,612.54/861,965.16 = 338,132.40/x
  3. Step 3: Cross multiply
    624,612.54x = 861,965.16 × 338,132.40
  4. Step 4: Simplify right side
    624,612.54x = 291,458,348,267.18
  5. Step 5: Solve for x
    x = 291,458,348,267.18/624,612.54
  6. Step 6: Final answer
    x = 466,622.63

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Double scale
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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.