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Finding the Fourth Proportional to 950.75, 1,311.91 and 531.05

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Solution

The fourth proportional to 950.75, 1,311.91 and 531.05 is: 732.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.75 : 1,311.91 = 531.05 : x
  2. Step 2: Convert to fraction form
    950.75/1,311.91 = 531.05/x
  3. Step 3: Cross multiply
    950.75x = 1,311.91 × 531.05
  4. Step 4: Simplify right side
    950.75x = 696,689.81
  5. Step 5: Solve for x
    x = 696,689.81/950.75
  6. Step 6: Final answer
    x = 732.78

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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.