Home / 1,279.36-1,766.28-984.04

Finding the Fourth Proportional to 1,279.36, 1,766.28 and 984.04

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Solution

The fourth proportional to 1,279.36, 1,766.28 and 984.04 is: 1,358.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.36 : 1,766.28 = 984.04 : x
  2. Step 2: Convert to fraction form
    1,279.36/1,766.28 = 984.04/x
  3. Step 3: Cross multiply
    1,279.36x = 1,766.28 × 984.04
  4. Step 4: Simplify right side
    1,279.36x = 1,738,090.17
  5. Step 5: Solve for x
    x = 1,738,090.17/1,279.36
  6. Step 6: Final answer
    x = 1,358.56

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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.