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Finding the Fourth Proportional to 447.78, 671.66 and 123.15

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Solution

The fourth proportional to 447.78, 671.66 and 123.15 is: 184.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.78 : 671.66 = 123.15 : x
  2. Step 2: Convert to fraction form
    447.78/671.66 = 123.15/x
  3. Step 3: Cross multiply
    447.78x = 671.66 × 123.15
  4. Step 4: Simplify right side
    447.78x = 82,714.93
  5. Step 5: Solve for x
    x = 82,714.93/447.78
  6. Step 6: Final answer
    x = 184.72

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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.