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Finding the Fourth Proportional to 527.59, 728.63 and 331.21

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Solution

The fourth proportional to 527.59, 728.63 and 331.21 is: 457.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.59 : 728.63 = 331.21 : x
  2. Step 2: Convert to fraction form
    527.59/728.63 = 331.21/x
  3. Step 3: Cross multiply
    527.59x = 728.63 × 331.21
  4. Step 4: Simplify right side
    527.59x = 241,329.54
  5. Step 5: Solve for x
    x = 241,329.54/527.59
  6. Step 6: Final answer
    x = 457.42

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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.