Home / 3,108.24-4,286.34-1,988.77

Finding the Fourth Proportional to 3,108.24, 4,286.34 and 1,988.77

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Solution

The fourth proportional to 3,108.24, 4,286.34 and 1,988.77 is: 2,742.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.24 : 4,286.34 = 1,988.77 : x
  2. Step 2: Convert to fraction form
    3,108.24/4,286.34 = 1,988.77/x
  3. Step 3: Cross multiply
    3,108.24x = 4,286.34 × 1,988.77
  4. Step 4: Simplify right side
    3,108.24x = 8,524,534.46
  5. Step 5: Solve for x
    x = 8,524,534.46/3,108.24
  6. Step 6: Final answer
    x = 2,742.56

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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.