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Finding the Fourth Proportional to 527.76, 728.33 and 318.00

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Solution

The fourth proportional to 527.76, 728.33 and 318.00 is: 438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.76 : 728.33 = 318.00 : x
  2. Step 2: Convert to fraction form
    527.76/728.33 = 318.00/x
  3. Step 3: Cross multiply
    527.76x = 728.33 × 318.00
  4. Step 4: Simplify right side
    527.76x = 231,608.97
  5. Step 5: Solve for x
    x = 231,608.97/527.76
  6. Step 6: Final answer
    x = 438.85

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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.