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Finding the Fourth Proportional to 2,686.76, 3,708 and 1,639.44

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Solution

The fourth proportional to 2,686.76, 3,708 and 1,639.44 is: 2,262.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.76 : 3,708 = 1,639.44 : x
  2. Step 2: Convert to fraction form
    2,686.76/3,708 = 1,639.44/x
  3. Step 3: Cross multiply
    2,686.76x = 3,708 × 1,639.44
  4. Step 4: Simplify right side
    2,686.76x = 6,079,043.52
  5. Step 5: Solve for x
    x = 6,079,043.52/2,686.76
  6. Step 6: Final answer
    x = 2,262.59

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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.