Home / 1,231.24-1,698.66-805.18

Finding the Fourth Proportional to 1,231.24, 1,698.66 and 805.18

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Solution

The fourth proportional to 1,231.24, 1,698.66 and 805.18 is: 1,110.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.24 : 1,698.66 = 805.18 : x
  2. Step 2: Convert to fraction form
    1,231.24/1,698.66 = 805.18/x
  3. Step 3: Cross multiply
    1,231.24x = 1,698.66 × 805.18
  4. Step 4: Simplify right side
    1,231.24x = 1,367,727.06
  5. Step 5: Solve for x
    x = 1,367,727.06/1,231.24
  6. Step 6: Final answer
    x = 1,110.85

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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.