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Finding the Fourth Proportional to 641.96, 963.44 and 459.52

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Solution

The fourth proportional to 641.96, 963.44 and 459.52 is: 689.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.96 : 963.44 = 459.52 : x
  2. Step 2: Convert to fraction form
    641.96/963.44 = 459.52/x
  3. Step 3: Cross multiply
    641.96x = 963.44 × 459.52
  4. Step 4: Simplify right side
    641.96x = 442,719.95
  5. Step 5: Solve for x
    x = 442,719.95/641.96
  6. Step 6: Final answer
    x = 689.64

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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.