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Finding the Fourth Proportional to 869.27, 1,296.03 and 842.13

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Solution

The fourth proportional to 869.27, 1,296.03 and 842.13 is: 1,255.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.27 : 1,296.03 = 842.13 : x
  2. Step 2: Convert to fraction form
    869.27/1,296.03 = 842.13/x
  3. Step 3: Cross multiply
    869.27x = 1,296.03 × 842.13
  4. Step 4: Simplify right side
    869.27x = 1,091,428.90
  5. Step 5: Solve for x
    x = 1,091,428.90/869.27
  6. Step 6: Final answer
    x = 1,255.58

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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.