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Finding the Fourth Proportional to 950.42, 1,311.08 and 557.39

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Solution

The fourth proportional to 950.42, 1,311.08 and 557.39 is: 768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.42 : 1,311.08 = 557.39 : x
  2. Step 2: Convert to fraction form
    950.42/1,311.08 = 557.39/x
  3. Step 3: Cross multiply
    950.42x = 1,311.08 × 557.39
  4. Step 4: Simplify right side
    950.42x = 730,773.54
  5. Step 5: Solve for x
    x = 730,773.54/950.42
  6. Step 6: Final answer
    x = 768.90

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1.5x scale

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.