Home / 1,118.27-1,676.32-387.29

Finding the Fourth Proportional to 1,118.27, 1,676.32 and 387.29

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Solution

The fourth proportional to 1,118.27, 1,676.32 and 387.29 is: 580.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.27 : 1,676.32 = 387.29 : x
  2. Step 2: Convert to fraction form
    1,118.27/1,676.32 = 387.29/x
  3. Step 3: Cross multiply
    1,118.27x = 1,676.32 × 387.29
  4. Step 4: Simplify right side
    1,118.27x = 649,221.97
  5. Step 5: Solve for x
    x = 649,221.97/1,118.27
  6. Step 6: Final answer
    x = 580.56

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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.