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Finding the Fourth Proportional to 624,609.31, 861,960.66 and 338,129.18

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Solution

The fourth proportional to 624,609.31, 861,960.66 and 338,129.18 is: 466,618.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,609.31 : 861,960.66 = 338,129.18 : x
  2. Step 2: Convert to fraction form
    624,609.31/861,960.66 = 338,129.18/x
  3. Step 3: Cross multiply
    624,609.31x = 861,960.66 × 338,129.18
  4. Step 4: Simplify right side
    624,609.31x = 291,454,051,158.06
  5. Step 5: Solve for x
    x = 291,454,051,158.06/624,609.31
  6. Step 6: Final answer
    x = 466,618.17

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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.