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Finding the Fourth Proportional to 527.92, 728.48 and 318.16

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Solution

The fourth proportional to 527.92, 728.48 and 318.16 is: 439.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.92 : 728.48 = 318.16 : x
  2. Step 2: Convert to fraction form
    527.92/728.48 = 318.16/x
  3. Step 3: Cross multiply
    527.92x = 728.48 × 318.16
  4. Step 4: Simplify right side
    527.92x = 231,773.20
  5. Step 5: Solve for x
    x = 231,773.20/527.92
  6. Step 6: Final answer
    x = 439.03

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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.