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Finding the Fourth Proportional to 2,891.60, 3,990.39 and 1,565.27

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Solution

The fourth proportional to 2,891.60, 3,990.39 and 1,565.27 is: 2,160.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.60 : 3,990.39 = 1,565.27 : x
  2. Step 2: Convert to fraction form
    2,891.60/3,990.39 = 1,565.27/x
  3. Step 3: Cross multiply
    2,891.60x = 3,990.39 × 1,565.27
  4. Step 4: Simplify right side
    2,891.60x = 6,246,037.76
  5. Step 5: Solve for x
    x = 6,246,037.76/2,891.60
  6. Step 6: Final answer
    x = 2,160.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.