Home / 2,149.24-3,224.34-688.38

Finding the Fourth Proportional to 2,149.24, 3,224.34 and 688.38

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Solution

The fourth proportional to 2,149.24, 3,224.34 and 688.38 is: 1,032.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.24 : 3,224.34 = 688.38 : x
  2. Step 2: Convert to fraction form
    2,149.24/3,224.34 = 688.38/x
  3. Step 3: Cross multiply
    2,149.24x = 3,224.34 × 688.38
  4. Step 4: Simplify right side
    2,149.24x = 2,219,571.17
  5. Step 5: Solve for x
    x = 2,219,571.17/2,149.24
  6. Step 6: Final answer
    x = 1,032.72

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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.