Home / 3,108.30-4,287.64-1,988.83

Finding the Fourth Proportional to 3,108.30, 4,287.64 and 1,988.83

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Solution

The fourth proportional to 3,108.30, 4,287.64 and 1,988.83 is: 2,743.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.30 : 4,287.64 = 1,988.83 : x
  2. Step 2: Convert to fraction form
    3,108.30/4,287.64 = 1,988.83/x
  3. Step 3: Cross multiply
    3,108.30x = 4,287.64 × 1,988.83
  4. Step 4: Simplify right side
    3,108.30x = 8,527,355.68
  5. Step 5: Solve for x
    x = 8,527,355.68/3,108.30
  6. Step 6: Final answer
    x = 2,743.41

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1.5x scale

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.