Home / 2,149.14-3,222.65-688.11

Finding the Fourth Proportional to 2,149.14, 3,222.65 and 688.11

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Solution

The fourth proportional to 2,149.14, 3,222.65 and 688.11 is: 1,031.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.14 : 3,222.65 = 688.11 : x
  2. Step 2: Convert to fraction form
    2,149.14/3,222.65 = 688.11/x
  3. Step 3: Cross multiply
    2,149.14x = 3,222.65 × 688.11
  4. Step 4: Simplify right side
    2,149.14x = 2,217,527.33
  5. Step 5: Solve for x
    x = 2,217,527.33/2,149.14
  6. Step 6: Final answer
    x = 1,031.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.