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Finding the Fourth Proportional to 527.11, 727.20 and 317.30

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Solution

The fourth proportional to 527.11, 727.20 and 317.30 is: 437.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.11 : 727.20 = 317.30 : x
  2. Step 2: Convert to fraction form
    527.11/727.20 = 317.30/x
  3. Step 3: Cross multiply
    527.11x = 727.20 × 317.30
  4. Step 4: Simplify right side
    527.11x = 230,740.56
  5. Step 5: Solve for x
    x = 230,740.56/527.11
  6. Step 6: Final answer
    x = 437.75

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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.