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Finding the Fourth Proportional to 950.72, 1,311.95 and 531.09

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Solution

The fourth proportional to 950.72, 1,311.95 and 531.09 is: 732.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.72 : 1,311.95 = 531.09 : x
  2. Step 2: Convert to fraction form
    950.72/1,311.95 = 531.09/x
  3. Step 3: Cross multiply
    950.72x = 1,311.95 × 531.09
  4. Step 4: Simplify right side
    950.72x = 696,760.87
  5. Step 5: Solve for x
    x = 696,760.87/950.72
  6. Step 6: Final answer
    x = 732.88

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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.