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Finding the Fourth Proportional to 527.65, 791.39 and 142.81

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Solution

The fourth proportional to 527.65, 791.39 and 142.81 is: 214.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.65 : 791.39 = 142.81 : x
  2. Step 2: Convert to fraction form
    527.65/791.39 = 142.81/x
  3. Step 3: Cross multiply
    527.65x = 791.39 × 142.81
  4. Step 4: Simplify right side
    527.65x = 113,020.03
  5. Step 5: Solve for x
    x = 113,020.03/527.65
  6. Step 6: Final answer
    x = 214.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.