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Finding the Fourth Proportional to 447.12, 669.87 and 273.78

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Solution

The fourth proportional to 447.12, 669.87 and 273.78 is: 410.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.12 : 669.87 = 273.78 : x
  2. Step 2: Convert to fraction form
    447.12/669.87 = 273.78/x
  3. Step 3: Cross multiply
    447.12x = 669.87 × 273.78
  4. Step 4: Simplify right side
    447.12x = 183,397.01
  5. Step 5: Solve for x
    x = 183,397.01/447.12
  6. Step 6: Final answer
    x = 410.17

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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.