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Finding the Fourth Proportional to 486.38, 671.14 and 276.56

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Solution

The fourth proportional to 486.38, 671.14 and 276.56 is: 381.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.38 : 671.14 = 276.56 : x
  2. Step 2: Convert to fraction form
    486.38/671.14 = 276.56/x
  3. Step 3: Cross multiply
    486.38x = 671.14 × 276.56
  4. Step 4: Simplify right side
    486.38x = 185,610.48
  5. Step 5: Solve for x
    x = 185,610.48/486.38
  6. Step 6: Final answer
    x = 381.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.