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Finding the Fourth Proportional to 460.58, 691.22 and 431.88

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Solution

The fourth proportional to 460.58, 691.22 and 431.88 is: 648.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.58 : 691.22 = 431.88 : x
  2. Step 2: Convert to fraction form
    460.58/691.22 = 431.88/x
  3. Step 3: Cross multiply
    460.58x = 691.22 × 431.88
  4. Step 4: Simplify right side
    460.58x = 298,524.09
  5. Step 5: Solve for x
    x = 298,524.09/460.58
  6. Step 6: Final answer
    x = 648.15

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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.