Home / 1,116.12-1,540.22-673.80

Finding the Fourth Proportional to 1,116.12, 1,540.22 and 673.80

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Solution

The fourth proportional to 1,116.12, 1,540.22 and 673.80 is: 929.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.12 : 1,540.22 = 673.80 : x
  2. Step 2: Convert to fraction form
    1,116.12/1,540.22 = 673.80/x
  3. Step 3: Cross multiply
    1,116.12x = 1,540.22 × 673.80
  4. Step 4: Simplify right side
    1,116.12x = 1,037,800.24
  5. Step 5: Solve for x
    x = 1,037,800.24/1,116.12
  6. Step 6: Final answer
    x = 929.83

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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.