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Finding the Fourth Proportional to 679.55, 1,016.28 and 496.76

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Solution

The fourth proportional to 679.55, 1,016.28 and 496.76 is: 742.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.55 : 1,016.28 = 496.76 : x
  2. Step 2: Convert to fraction form
    679.55/1,016.28 = 496.76/x
  3. Step 3: Cross multiply
    679.55x = 1,016.28 × 496.76
  4. Step 4: Simplify right side
    679.55x = 504,842.17
  5. Step 5: Solve for x
    x = 504,842.17/679.55
  6. Step 6: Final answer
    x = 742.91

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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.