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Finding the Fourth Proportional to 2,489.76, 3,734.64 and 1,008.90

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Solution

The fourth proportional to 2,489.76, 3,734.64 and 1,008.90 is: 1,513.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.76 : 3,734.64 = 1,008.90 : x
  2. Step 2: Convert to fraction form
    2,489.76/3,734.64 = 1,008.90/x
  3. Step 3: Cross multiply
    2,489.76x = 3,734.64 × 1,008.90
  4. Step 4: Simplify right side
    2,489.76x = 3,767,878.30
  5. Step 5: Solve for x
    x = 3,767,878.30/2,489.76
  6. Step 6: Final answer
    x = 1,513.35

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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.