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Finding the Fourth Proportional to 666.86, 1,000.22 and 179.95

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Solution

The fourth proportional to 666.86, 1,000.22 and 179.95 is: 269.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.86 : 1,000.22 = 179.95 : x
  2. Step 2: Convert to fraction form
    666.86/1,000.22 = 179.95/x
  3. Step 3: Cross multiply
    666.86x = 1,000.22 × 179.95
  4. Step 4: Simplify right side
    666.86x = 179,989.59
  5. Step 5: Solve for x
    x = 179,989.59/666.86
  6. Step 6: Final answer
    x = 269.91

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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.