Home / 1,116.12-1,540.25-618.77

Finding the Fourth Proportional to 1,116.12, 1,540.25 and 618.77

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Solution

The fourth proportional to 1,116.12, 1,540.25 and 618.77 is: 853.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.12 : 1,540.25 = 618.77 : x
  2. Step 2: Convert to fraction form
    1,116.12/1,540.25 = 618.77/x
  3. Step 3: Cross multiply
    1,116.12x = 1,540.25 × 618.77
  4. Step 4: Simplify right side
    1,116.12x = 953,053.56
  5. Step 5: Solve for x
    x = 953,053.56/1,116.12
  6. Step 6: Final answer
    x = 853.90

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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.