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Finding the Fourth Proportional to 731.39, 1,008.75 and 465.87

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Solution

The fourth proportional to 731.39, 1,008.75 and 465.87 is: 642.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.39 : 1,008.75 = 465.87 : x
  2. Step 2: Convert to fraction form
    731.39/1,008.75 = 465.87/x
  3. Step 3: Cross multiply
    731.39x = 1,008.75 × 465.87
  4. Step 4: Simplify right side
    731.39x = 469,951.89
  5. Step 5: Solve for x
    x = 469,951.89/731.39
  6. Step 6: Final answer
    x = 642.55

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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.