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Finding the Fourth Proportional to 461.30, 691.98 and 153.15

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Solution

The fourth proportional to 461.30, 691.98 and 153.15 is: 229.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.30 : 691.98 = 153.15 : x
  2. Step 2: Convert to fraction form
    461.30/691.98 = 153.15/x
  3. Step 3: Cross multiply
    461.30x = 691.98 × 153.15
  4. Step 4: Simplify right side
    461.30x = 105,976.74
  5. Step 5: Solve for x
    x = 105,976.74/461.30
  6. Step 6: Final answer
    x = 229.74

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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.