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Finding the Fourth Proportional to 950.30, 1,311.43 and 557.33

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Solution

The fourth proportional to 950.30, 1,311.43 and 557.33 is: 769.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.30 : 1,311.43 = 557.33 : x
  2. Step 2: Convert to fraction form
    950.30/1,311.43 = 557.33/x
  3. Step 3: Cross multiply
    950.30x = 1,311.43 × 557.33
  4. Step 4: Simplify right side
    950.30x = 730,901.17
  5. Step 5: Solve for x
    x = 730,901.17/950.30
  6. Step 6: Final answer
    x = 769.12

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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.