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Finding the Fourth Proportional to 447.09, 670.89 and 187.05

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Solution

The fourth proportional to 447.09, 670.89 and 187.05 is: 280.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.09 : 670.89 = 187.05 : x
  2. Step 2: Convert to fraction form
    447.09/670.89 = 187.05/x
  3. Step 3: Cross multiply
    447.09x = 670.89 × 187.05
  4. Step 4: Simplify right side
    447.09x = 125,489.97
  5. Step 5: Solve for x
    x = 125,489.97/447.09
  6. Step 6: Final answer
    x = 280.68

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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.