Home / 1,422.26-1,962.97-1,129.76

Finding the Fourth Proportional to 1,422.26, 1,962.97 and 1,129.76

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Solution

The fourth proportional to 1,422.26, 1,962.97 and 1,129.76 is: 1,559.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.26 : 1,962.97 = 1,129.76 : x
  2. Step 2: Convert to fraction form
    1,422.26/1,962.97 = 1,129.76/x
  3. Step 3: Cross multiply
    1,422.26x = 1,962.97 × 1,129.76
  4. Step 4: Simplify right side
    1,422.26x = 2,217,684.99
  5. Step 5: Solve for x
    x = 2,217,684.99/1,422.26
  6. Step 6: Final answer
    x = 1,559.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.