Home / 1,116.57-1,540.77-619.20

Finding the Fourth Proportional to 1,116.57, 1,540.77 and 619.20

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Solution

The fourth proportional to 1,116.57, 1,540.77 and 619.20 is: 854.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.57 : 1,540.77 = 619.20 : x
  2. Step 2: Convert to fraction form
    1,116.57/1,540.77 = 619.20/x
  3. Step 3: Cross multiply
    1,116.57x = 1,540.77 × 619.20
  4. Step 4: Simplify right side
    1,116.57x = 954,044.78
  5. Step 5: Solve for x
    x = 954,044.78/1,116.57
  6. Step 6: Final answer
    x = 854.44

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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.