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Finding the Fourth Proportional to 681, 1,016.85 and 558.96

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Solution

The fourth proportional to 681, 1,016.85 and 558.96 is: 834.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    681 : 1,016.85 = 558.96 : x
  2. Step 2: Convert to fraction form
    681/1,016.85 = 558.96/x
  3. Step 3: Cross multiply
    681x = 1,016.85 × 558.96
  4. Step 4: Simplify right side
    681x = 568,378.48
  5. Step 5: Solve for x
    x = 568,378.48/681
  6. Step 6: Final answer
    x = 834.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.