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Finding the Fourth Proportional to 527.25, 790.92 and 142.50

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Solution

The fourth proportional to 527.25, 790.92 and 142.50 is: 213.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.25 : 790.92 = 142.50 : x
  2. Step 2: Convert to fraction form
    527.25/790.92 = 142.50/x
  3. Step 3: Cross multiply
    527.25x = 790.92 × 142.50
  4. Step 4: Simplify right side
    527.25x = 112,706.10
  5. Step 5: Solve for x
    x = 112,706.10/527.25
  6. Step 6: Final answer
    x = 213.76

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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.