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Finding the Fourth Proportional to 2,505.76, 3,759.43 and 862.39

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Solution

The fourth proportional to 2,505.76, 3,759.43 and 862.39 is: 1,293.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,505.76 : 3,759.43 = 862.39 : x
  2. Step 2: Convert to fraction form
    2,505.76/3,759.43 = 862.39/x
  3. Step 3: Cross multiply
    2,505.76x = 3,759.43 × 862.39
  4. Step 4: Simplify right side
    2,505.76x = 3,242,094.84
  5. Step 5: Solve for x
    x = 3,242,094.84/2,505.76
  6. Step 6: Final answer
    x = 1,293.86

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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.