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Finding the Fourth Proportional to 447.32, 671.01 and 139.13

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Solution

The fourth proportional to 447.32, 671.01 and 139.13 is: 208.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.32 : 671.01 = 139.13 : x
  2. Step 2: Convert to fraction form
    447.32/671.01 = 139.13/x
  3. Step 3: Cross multiply
    447.32x = 671.01 × 139.13
  4. Step 4: Simplify right side
    447.32x = 93,356.93
  5. Step 5: Solve for x
    x = 93,356.93/447.32
  6. Step 6: Final answer
    x = 208.71

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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.