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Finding the Fourth Proportional to 805.27, 1,110.54 and 681.19

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Solution

The fourth proportional to 805.27, 1,110.54 and 681.19 is: 939.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.27 : 1,110.54 = 681.19 : x
  2. Step 2: Convert to fraction form
    805.27/1,110.54 = 681.19/x
  3. Step 3: Cross multiply
    805.27x = 1,110.54 × 681.19
  4. Step 4: Simplify right side
    805.27x = 756,488.74
  5. Step 5: Solve for x
    x = 756,488.74/805.27
  6. Step 6: Final answer
    x = 939.42

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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.