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Finding the Fourth Proportional to 437.91, 655.79 and 254.85

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Solution

The fourth proportional to 437.91, 655.79 and 254.85 is: 381.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.91 : 655.79 = 254.85 : x
  2. Step 2: Convert to fraction form
    437.91/655.79 = 254.85/x
  3. Step 3: Cross multiply
    437.91x = 655.79 × 254.85
  4. Step 4: Simplify right side
    437.91x = 167,126.81
  5. Step 5: Solve for x
    x = 167,126.81/437.91
  6. Step 6: Final answer
    x = 381.65

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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.