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Finding the Fourth Proportional to 527.90, 727.77 and 331.28

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Solution

The fourth proportional to 527.90, 727.77 and 331.28 is: 456.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.90 : 727.77 = 331.28 : x
  2. Step 2: Convert to fraction form
    527.90/727.77 = 331.28/x
  3. Step 3: Cross multiply
    527.90x = 727.77 × 331.28
  4. Step 4: Simplify right side
    527.90x = 241,095.65
  5. Step 5: Solve for x
    x = 241,095.65/527.90
  6. Step 6: Final answer
    x = 456.71

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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.