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Finding the Fourth Proportional to 2,489.80, 3,733.62 and 1,256.44

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Solution

The fourth proportional to 2,489.80, 3,733.62 and 1,256.44 is: 1,884.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.80 : 3,733.62 = 1,256.44 : x
  2. Step 2: Convert to fraction form
    2,489.80/3,733.62 = 1,256.44/x
  3. Step 3: Cross multiply
    2,489.80x = 3,733.62 × 1,256.44
  4. Step 4: Simplify right side
    2,489.80x = 4,691,069.51
  5. Step 5: Solve for x
    x = 4,691,069.51/2,489.80
  6. Step 6: Final answer
    x = 1,884.11

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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.