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Finding the Fourth Proportional to 414.50, 621.27 and 170.72

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Solution

The fourth proportional to 414.50, 621.27 and 170.72 is: 255.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.50 : 621.27 = 170.72 : x
  2. Step 2: Convert to fraction form
    414.50/621.27 = 170.72/x
  3. Step 3: Cross multiply
    414.50x = 621.27 × 170.72
  4. Step 4: Simplify right side
    414.50x = 106,060.11
  5. Step 5: Solve for x
    x = 106,060.11/414.50
  6. Step 6: Final answer
    x = 255.88

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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.