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Finding the Fourth Proportional to 527.20, 727.42 and 330.80

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Solution

The fourth proportional to 527.20, 727.42 and 330.80 is: 456.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.20 : 727.42 = 330.80 : x
  2. Step 2: Convert to fraction form
    527.20/727.42 = 330.80/x
  3. Step 3: Cross multiply
    527.20x = 727.42 × 330.80
  4. Step 4: Simplify right side
    527.20x = 240,630.54
  5. Step 5: Solve for x
    x = 240,630.54/527.20
  6. Step 6: Final answer
    x = 456.43

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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.