Home / 1,279.06-1,766.84-1,129.93

Finding the Fourth Proportional to 1,279.06, 1,766.84 and 1,129.93

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Solution

The fourth proportional to 1,279.06, 1,766.84 and 1,129.93 is: 1,560.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.06 : 1,766.84 = 1,129.93 : x
  2. Step 2: Convert to fraction form
    1,279.06/1,766.84 = 1,129.93/x
  3. Step 3: Cross multiply
    1,279.06x = 1,766.84 × 1,129.93
  4. Step 4: Simplify right side
    1,279.06x = 1,996,395.45
  5. Step 5: Solve for x
    x = 1,996,395.45/1,279.06
  6. Step 6: Final answer
    x = 1,560.83

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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.