Home / 2,127.26-3,189.17-665.66

Finding the Fourth Proportional to 2,127.26, 3,189.17 and 665.66

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Solution

The fourth proportional to 2,127.26, 3,189.17 and 665.66 is: 997.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.26 : 3,189.17 = 665.66 : x
  2. Step 2: Convert to fraction form
    2,127.26/3,189.17 = 665.66/x
  3. Step 3: Cross multiply
    2,127.26x = 3,189.17 × 665.66
  4. Step 4: Simplify right side
    2,127.26x = 2,122,902.90
  5. Step 5: Solve for x
    x = 2,122,902.90/2,127.26
  6. Step 6: Final answer
    x = 997.95

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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.