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Finding the Fourth Proportional to 457, 685.48 and 225.81

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Solution

The fourth proportional to 457, 685.48 and 225.81 is: 338.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    457 : 685.48 = 225.81 : x
  2. Step 2: Convert to fraction form
    457/685.48 = 225.81/x
  3. Step 3: Cross multiply
    457x = 685.48 × 225.81
  4. Step 4: Simplify right side
    457x = 154,788.24
  5. Step 5: Solve for x
    x = 154,788.24/457
  6. Step 6: Final answer
    x = 338.71

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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.