Home / 1,422.23-2,132.82-872.75

Finding the Fourth Proportional to 1,422.23, 2,132.82 and 872.75

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Solution

The fourth proportional to 1,422.23, 2,132.82 and 872.75 is: 1,308.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.23 : 2,132.82 = 872.75 : x
  2. Step 2: Convert to fraction form
    1,422.23/2,132.82 = 872.75/x
  3. Step 3: Cross multiply
    1,422.23x = 2,132.82 × 872.75
  4. Step 4: Simplify right side
    1,422.23x = 1,861,407.99
  5. Step 5: Solve for x
    x = 1,861,407.99/1,422.23
  6. Step 6: Final answer
    x = 1,308.80

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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.