Home / 2,291.80-3,162.18-1,297.12

Finding the Fourth Proportional to 2,291.80, 3,162.18 and 1,297.12

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Solution

The fourth proportional to 2,291.80, 3,162.18 and 1,297.12 is: 1,789.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.80 : 3,162.18 = 1,297.12 : x
  2. Step 2: Convert to fraction form
    2,291.80/3,162.18 = 1,297.12/x
  3. Step 3: Cross multiply
    2,291.80x = 3,162.18 × 1,297.12
  4. Step 4: Simplify right side
    2,291.80x = 4,101,726.92
  5. Step 5: Solve for x
    x = 4,101,726.92/2,291.80
  6. Step 6: Final answer
    x = 1,789.74

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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.