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Finding the Fourth Proportional to 950.43, 1,311.90 and 557.44

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Solution

The fourth proportional to 950.43, 1,311.90 and 557.44 is: 769.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.43 : 1,311.90 = 557.44 : x
  2. Step 2: Convert to fraction form
    950.43/1,311.90 = 557.44/x
  3. Step 3: Cross multiply
    950.43x = 1,311.90 × 557.44
  4. Step 4: Simplify right side
    950.43x = 731,305.54
  5. Step 5: Solve for x
    x = 731,305.54/950.43
  6. Step 6: Final answer
    x = 769.45

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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.