Home / 1,116.20-1,540.37-618.87

Finding the Fourth Proportional to 1,116.20, 1,540.37 and 618.87

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Solution

The fourth proportional to 1,116.20, 1,540.37 and 618.87 is: 854.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.20 : 1,540.37 = 618.87 : x
  2. Step 2: Convert to fraction form
    1,116.20/1,540.37 = 618.87/x
  3. Step 3: Cross multiply
    1,116.20x = 1,540.37 × 618.87
  4. Step 4: Simplify right side
    1,116.20x = 953,292.62
  5. Step 5: Solve for x
    x = 953,292.62/1,116.20
  6. Step 6: Final answer
    x = 854.05

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1.5x scale

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.