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Finding the Fourth Proportional to 3,649, 5,034.45 and 2,157.42

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Solution

The fourth proportional to 3,649, 5,034.45 and 2,157.42 is: 2,976.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,649 : 5,034.45 = 2,157.42 : x
  2. Step 2: Convert to fraction form
    3,649/5,034.45 = 2,157.42/x
  3. Step 3: Cross multiply
    3,649x = 5,034.45 × 2,157.42
  4. Step 4: Simplify right side
    3,649x = 10,861,387.16
  5. Step 5: Solve for x
    x = 10,861,387.16/3,649
  6. Step 6: Final answer
    x = 2,976.54

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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.