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Finding the Fourth Proportional to 950.80, 1,311.72 and 635.92

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Solution

The fourth proportional to 950.80, 1,311.72 and 635.92 is: 877.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.80 : 1,311.72 = 635.92 : x
  2. Step 2: Convert to fraction form
    950.80/1,311.72 = 635.92/x
  3. Step 3: Cross multiply
    950.80x = 1,311.72 × 635.92
  4. Step 4: Simplify right side
    950.80x = 834,148.98
  5. Step 5: Solve for x
    x = 834,148.98/950.80
  6. Step 6: Final answer
    x = 877.31

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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.