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Finding the Fourth Proportional to 3,659.64, 5,489.64 and 1,062.78

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Solution

The fourth proportional to 3,659.64, 5,489.64 and 1,062.78 is: 1,594.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,659.64 : 5,489.64 = 1,062.78 : x
  2. Step 2: Convert to fraction form
    3,659.64/5,489.64 = 1,062.78/x
  3. Step 3: Cross multiply
    3,659.64x = 5,489.64 × 1,062.78
  4. Step 4: Simplify right side
    3,659.64x = 5,834,279.60
  5. Step 5: Solve for x
    x = 5,834,279.60/3,659.64
  6. Step 6: Final answer
    x = 1,594.22

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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.