Home / 1,296.29-1,945.17-680.55

Finding the Fourth Proportional to 1,296.29, 1,945.17 and 680.55

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Solution

The fourth proportional to 1,296.29, 1,945.17 and 680.55 is: 1,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.29 : 1,945.17 = 680.55 : x
  2. Step 2: Convert to fraction form
    1,296.29/1,945.17 = 680.55/x
  3. Step 3: Cross multiply
    1,296.29x = 1,945.17 × 680.55
  4. Step 4: Simplify right side
    1,296.29x = 1,323,785.44
  5. Step 5: Solve for x
    x = 1,323,785.44/1,296.29
  6. Step 6: Final answer
    x = 1,021.21

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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.