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Finding the Fourth Proportional to 527.80, 728.34 and 331.24

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Solution

The fourth proportional to 527.80, 728.34 and 331.24 is: 457.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.80 : 728.34 = 331.24 : x
  2. Step 2: Convert to fraction form
    527.80/728.34 = 331.24/x
  3. Step 3: Cross multiply
    527.80x = 728.34 × 331.24
  4. Step 4: Simplify right side
    527.80x = 241,255.34
  5. Step 5: Solve for x
    x = 241,255.34/527.80
  6. Step 6: Final answer
    x = 457.10

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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.