Home / 1,279.62-1,764.66-1,185.30

Finding the Fourth Proportional to 1,279.62, 1,764.66 and 1,185.30

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Solution

The fourth proportional to 1,279.62, 1,764.66 and 1,185.30 is: 1,634.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.62 : 1,764.66 = 1,185.30 : x
  2. Step 2: Convert to fraction form
    1,279.62/1,764.66 = 1,185.30/x
  3. Step 3: Cross multiply
    1,279.62x = 1,764.66 × 1,185.30
  4. Step 4: Simplify right side
    1,279.62x = 2,091,655.91
  5. Step 5: Solve for x
    x = 2,091,655.91/1,279.62
  6. Step 6: Final answer
    x = 1,634.59

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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.