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Finding the Fourth Proportional to 529.97, 731.40 and 308.88

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Solution

The fourth proportional to 529.97, 731.40 and 308.88 is: 426.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.97 : 731.40 = 308.88 : x
  2. Step 2: Convert to fraction form
    529.97/731.40 = 308.88/x
  3. Step 3: Cross multiply
    529.97x = 731.40 × 308.88
  4. Step 4: Simplify right side
    529.97x = 225,912.67
  5. Step 5: Solve for x
    x = 225,912.67/529.97
  6. Step 6: Final answer
    x = 426.27

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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.