Home / 1,115.18-1,540.41-854.54

Finding the Fourth Proportional to 1,115.18, 1,540.41 and 854.54

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Solution

The fourth proportional to 1,115.18, 1,540.41 and 854.54 is: 1,180.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.18 : 1,540.41 = 854.54 : x
  2. Step 2: Convert to fraction form
    1,115.18/1,540.41 = 854.54/x
  3. Step 3: Cross multiply
    1,115.18x = 1,540.41 × 854.54
  4. Step 4: Simplify right side
    1,115.18x = 1,316,341.96
  5. Step 5: Solve for x
    x = 1,316,341.96/1,115.18
  6. Step 6: Final answer
    x = 1,180.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.