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Finding the Fourth Proportional to 2,505.87, 3,759.05 and 862.20

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Solution

The fourth proportional to 2,505.87, 3,759.05 and 862.20 is: 1,293.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,505.87 : 3,759.05 = 862.20 : x
  2. Step 2: Convert to fraction form
    2,505.87/3,759.05 = 862.20/x
  3. Step 3: Cross multiply
    2,505.87x = 3,759.05 × 862.20
  4. Step 4: Simplify right side
    2,505.87x = 3,241,052.91
  5. Step 5: Solve for x
    x = 3,241,052.91/2,505.87
  6. Step 6: Final answer
    x = 1,293.38

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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.