Home / 1,121.24-1,691.98-1,080.56

Finding the Fourth Proportional to 1,121.24, 1,691.98 and 1,080.56

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Solution

The fourth proportional to 1,121.24, 1,691.98 and 1,080.56 is: 1,630.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.24 : 1,691.98 = 1,080.56 : x
  2. Step 2: Convert to fraction form
    1,121.24/1,691.98 = 1,080.56/x
  3. Step 3: Cross multiply
    1,121.24x = 1,691.98 × 1,080.56
  4. Step 4: Simplify right side
    1,121.24x = 1,828,280.51
  5. Step 5: Solve for x
    x = 1,828,280.51/1,121.24
  6. Step 6: Final answer
    x = 1,630.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.