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Finding the Fourth Proportional to 3,758.80, 5,638.80 and 1,161.13

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Solution

The fourth proportional to 3,758.80, 5,638.80 and 1,161.13 is: 1,741.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,758.80 : 5,638.80 = 1,161.13 : x
  2. Step 2: Convert to fraction form
    3,758.80/5,638.80 = 1,161.13/x
  3. Step 3: Cross multiply
    3,758.80x = 5,638.80 × 1,161.13
  4. Step 4: Simplify right side
    3,758.80x = 6,547,379.84
  5. Step 5: Solve for x
    x = 6,547,379.84/3,758.80
  6. Step 6: Final answer
    x = 1,741.88

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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.