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Finding the Fourth Proportional to 786.38, 1,174.91 and 759.11

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Solution

The fourth proportional to 786.38, 1,174.91 and 759.11 is: 1,134.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.38 : 1,174.91 = 759.11 : x
  2. Step 2: Convert to fraction form
    786.38/1,174.91 = 759.11/x
  3. Step 3: Cross multiply
    786.38x = 1,174.91 × 759.11
  4. Step 4: Simplify right side
    786.38x = 891,876.26
  5. Step 5: Solve for x
    x = 891,876.26/786.38
  6. Step 6: Final answer
    x = 1,134.16

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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.