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Finding the Fourth Proportional to 461.40, 691.26 and 268.44

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Solution

The fourth proportional to 461.40, 691.26 and 268.44 is: 402.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.40 : 691.26 = 268.44 : x
  2. Step 2: Convert to fraction form
    461.40/691.26 = 268.44/x
  3. Step 3: Cross multiply
    461.40x = 691.26 × 268.44
  4. Step 4: Simplify right side
    461.40x = 185,561.83
  5. Step 5: Solve for x
    x = 185,561.83/461.40
  6. Step 6: Final answer
    x = 402.17

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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.