Home / 1,178.97-1,769.21-1,085.11

Finding the Fourth Proportional to 1,178.97, 1,769.21 and 1,085.11

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Solution

The fourth proportional to 1,178.97, 1,769.21 and 1,085.11 is: 1,628.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.97 : 1,769.21 = 1,085.11 : x
  2. Step 2: Convert to fraction form
    1,178.97/1,769.21 = 1,085.11/x
  3. Step 3: Cross multiply
    1,178.97x = 1,769.21 × 1,085.11
  4. Step 4: Simplify right side
    1,178.97x = 1,919,781.68
  5. Step 5: Solve for x
    x = 1,919,781.68/1,178.97
  6. Step 6: Final answer
    x = 1,628.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.