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Finding the Fourth Proportional to 3,909, 5,862.90 and 1,135.10

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Solution

The fourth proportional to 3,909, 5,862.90 and 1,135.10 is: 1,702.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909 : 5,862.90 = 1,135.10 : x
  2. Step 2: Convert to fraction form
    3,909/5,862.90 = 1,135.10/x
  3. Step 3: Cross multiply
    3,909x = 5,862.90 × 1,135.10
  4. Step 4: Simplify right side
    3,909x = 6,654,948.48
  5. Step 5: Solve for x
    x = 6,654,948.48/3,909
  6. Step 6: Final answer
    x = 1,702.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.