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Finding the Fourth Proportional to 950.64, 1,423.32 and 641.88

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Solution

The fourth proportional to 950.64, 1,423.32 and 641.88 is: 961.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.64 : 1,423.32 = 641.88 : x
  2. Step 2: Convert to fraction form
    950.64/1,423.32 = 641.88/x
  3. Step 3: Cross multiply
    950.64x = 1,423.32 × 641.88
  4. Step 4: Simplify right side
    950.64x = 913,600.64
  5. Step 5: Solve for x
    x = 913,600.64/950.64
  6. Step 6: Final answer
    x = 961.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.