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Finding the Fourth Proportional to 815.95, 1,217.96 and 701.13

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Solution

The fourth proportional to 815.95, 1,217.96 and 701.13 is: 1,046.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.95 : 1,217.96 = 701.13 : x
  2. Step 2: Convert to fraction form
    815.95/1,217.96 = 701.13/x
  3. Step 3: Cross multiply
    815.95x = 1,217.96 × 701.13
  4. Step 4: Simplify right side
    815.95x = 853,948.29
  5. Step 5: Solve for x
    x = 853,948.29/815.95
  6. Step 6: Final answer
    x = 1,046.57

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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.