Home / 1,180.10-1,769.92-1,121.56

Finding the Fourth Proportional to 1,180.10, 1,769.92 and 1,121.56

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Solution

The fourth proportional to 1,180.10, 1,769.92 and 1,121.56 is: 1,682.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.10 : 1,769.92 = 1,121.56 : x
  2. Step 2: Convert to fraction form
    1,180.10/1,769.92 = 1,121.56/x
  3. Step 3: Cross multiply
    1,180.10x = 1,769.92 × 1,121.56
  4. Step 4: Simplify right side
    1,180.10x = 1,985,064.25
  5. Step 5: Solve for x
    x = 1,985,064.25/1,180.10
  6. Step 6: Final answer
    x = 1,682.11

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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.