Home / 1,080.20-1,618.23-616.61

Finding the Fourth Proportional to 1,080.20, 1,618.23 and 616.61

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Solution

The fourth proportional to 1,080.20, 1,618.23 and 616.61 is: 923.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.20 : 1,618.23 = 616.61 : x
  2. Step 2: Convert to fraction form
    1,080.20/1,618.23 = 616.61/x
  3. Step 3: Cross multiply
    1,080.20x = 1,618.23 × 616.61
  4. Step 4: Simplify right side
    1,080.20x = 997,816.80
  5. Step 5: Solve for x
    x = 997,816.80/1,080.20
  6. Step 6: Final answer
    x = 923.73

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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.