Home / 2,231.66-3,080-1,287.61

Finding the Fourth Proportional to 2,231.66, 3,080 and 1,287.61

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Solution

The fourth proportional to 2,231.66, 3,080 and 1,287.61 is: 1,777.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.66 : 3,080 = 1,287.61 : x
  2. Step 2: Convert to fraction form
    2,231.66/3,080 = 1,287.61/x
  3. Step 3: Cross multiply
    2,231.66x = 3,080 × 1,287.61
  4. Step 4: Simplify right side
    2,231.66x = 3,965,838.80
  5. Step 5: Solve for x
    x = 3,965,838.80/2,231.66
  6. Step 6: Final answer
    x = 1,777.08

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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.