Home / 2,149.99-3,225.17-688.75

Finding the Fourth Proportional to 2,149.99, 3,225.17 and 688.75

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Solution

The fourth proportional to 2,149.99, 3,225.17 and 688.75 is: 1,033.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.99 : 3,225.17 = 688.75 : x
  2. Step 2: Convert to fraction form
    2,149.99/3,225.17 = 688.75/x
  3. Step 3: Cross multiply
    2,149.99x = 3,225.17 × 688.75
  4. Step 4: Simplify right side
    2,149.99x = 2,221,335.84
  5. Step 5: Solve for x
    x = 2,221,335.84/2,149.99
  6. Step 6: Final answer
    x = 1,033.18

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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.