Home / 2,890.62-3,988.80-1,631.61

Finding the Fourth Proportional to 2,890.62, 3,988.80 and 1,631.61

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Solution

The fourth proportional to 2,890.62, 3,988.80 and 1,631.61 is: 2,251.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.62 : 3,988.80 = 1,631.61 : x
  2. Step 2: Convert to fraction form
    2,890.62/3,988.80 = 1,631.61/x
  3. Step 3: Cross multiply
    2,890.62x = 3,988.80 × 1,631.61
  4. Step 4: Simplify right side
    2,890.62x = 6,508,165.97
  5. Step 5: Solve for x
    x = 6,508,165.97/2,890.62
  6. Step 6: Final answer
    x = 2,251.48

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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.