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Finding the Fourth Proportional to 950.75, 1,311.41 and 557.49

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Solution

The fourth proportional to 950.75, 1,311.41 and 557.49 is: 768.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.75 : 1,311.41 = 557.49 : x
  2. Step 2: Convert to fraction form
    950.75/1,311.41 = 557.49/x
  3. Step 3: Cross multiply
    950.75x = 1,311.41 × 557.49
  4. Step 4: Simplify right side
    950.75x = 731,099.35
  5. Step 5: Solve for x
    x = 731,099.35/950.75
  6. Step 6: Final answer
    x = 768.98

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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.