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Finding the Fourth Proportional to 2,489.60, 3,731.96 and 845.06

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Solution

The fourth proportional to 2,489.60, 3,731.96 and 845.06 is: 1,266.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.60 : 3,731.96 = 845.06 : x
  2. Step 2: Convert to fraction form
    2,489.60/3,731.96 = 845.06/x
  3. Step 3: Cross multiply
    2,489.60x = 3,731.96 × 845.06
  4. Step 4: Simplify right side
    2,489.60x = 3,153,713.57
  5. Step 5: Solve for x
    x = 3,153,713.57/2,489.60
  6. Step 6: Final answer
    x = 1,266.75

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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.