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Finding the Fourth Proportional to 731.38, 1,008.84 and 469.48

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Solution

The fourth proportional to 731.38, 1,008.84 and 469.48 is: 647.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.38 : 1,008.84 = 469.48 : x
  2. Step 2: Convert to fraction form
    731.38/1,008.84 = 469.48/x
  3. Step 3: Cross multiply
    731.38x = 1,008.84 × 469.48
  4. Step 4: Simplify right side
    731.38x = 473,630.20
  5. Step 5: Solve for x
    x = 473,630.20/731.38
  6. Step 6: Final answer
    x = 647.58

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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.