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Finding the Fourth Proportional to 731.43, 1,008.99 and 451.58

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Solution

The fourth proportional to 731.43, 1,008.99 and 451.58 is: 622.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.43 : 1,008.99 = 451.58 : x
  2. Step 2: Convert to fraction form
    731.43/1,008.99 = 451.58/x
  3. Step 3: Cross multiply
    731.43x = 1,008.99 × 451.58
  4. Step 4: Simplify right side
    731.43x = 455,634.66
  5. Step 5: Solve for x
    x = 455,634.66/731.43
  6. Step 6: Final answer
    x = 622.94

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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.