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Finding the Fourth Proportional to 731.61, 1,008.69 and 436.77

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Solution

The fourth proportional to 731.61, 1,008.69 and 436.77 is: 602.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.61 : 1,008.69 = 436.77 : x
  2. Step 2: Convert to fraction form
    731.61/1,008.69 = 436.77/x
  3. Step 3: Cross multiply
    731.61x = 1,008.69 × 436.77
  4. Step 4: Simplify right side
    731.61x = 440,565.53
  5. Step 5: Solve for x
    x = 440,565.53/731.61
  6. Step 6: Final answer
    x = 602.19

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Half scale
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Double scale
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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.