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Finding the Fourth Proportional to 447.20, 670.86 and 158.56

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Solution

The fourth proportional to 447.20, 670.86 and 158.56 is: 237.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.20 : 670.86 = 158.56 : x
  2. Step 2: Convert to fraction form
    447.20/670.86 = 158.56/x
  3. Step 3: Cross multiply
    447.20x = 670.86 × 158.56
  4. Step 4: Simplify right side
    447.20x = 106,371.56
  5. Step 5: Solve for x
    x = 106,371.56/447.20
  6. Step 6: Final answer
    x = 237.86

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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.