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Finding the Fourth Proportional to 447.84, 671.75 and 123.20

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Solution

The fourth proportional to 447.84, 671.75 and 123.20 is: 184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.84 : 671.75 = 123.20 : x
  2. Step 2: Convert to fraction form
    447.84/671.75 = 123.20/x
  3. Step 3: Cross multiply
    447.84x = 671.75 × 123.20
  4. Step 4: Simplify right side
    447.84x = 82,759.60
  5. Step 5: Solve for x
    x = 82,759.60/447.84
  6. Step 6: Final answer
    x = 184.80

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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.