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Finding the Fourth Proportional to 527.75, 728.31 and 291.69

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Solution

The fourth proportional to 527.75, 728.31 and 291.69 is: 402.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.75 : 728.31 = 291.69 : x
  2. Step 2: Convert to fraction form
    527.75/728.31 = 291.69/x
  3. Step 3: Cross multiply
    527.75x = 728.31 × 291.69
  4. Step 4: Simplify right side
    527.75x = 212,444.57
  5. Step 5: Solve for x
    x = 212,444.57/527.75
  6. Step 6: Final answer
    x = 402.55

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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.