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Finding the Fourth Proportional to 3,862, 5,330.24 and 2,290.20

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Solution

The fourth proportional to 3,862, 5,330.24 and 2,290.20 is: 3,160.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,862 : 5,330.24 = 2,290.20 : x
  2. Step 2: Convert to fraction form
    3,862/5,330.24 = 2,290.20/x
  3. Step 3: Cross multiply
    3,862x = 5,330.24 × 2,290.20
  4. Step 4: Simplify right side
    3,862x = 12,207,315.65
  5. Step 5: Solve for x
    x = 12,207,315.65/3,862
  6. Step 6: Final answer
    x = 3,160.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.