Home / 1,538.56-2,121.24-1,118.56

Finding the Fourth Proportional to 1,538.56, 2,121.24 and 1,118.56

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Solution

The fourth proportional to 1,538.56, 2,121.24 and 1,118.56 is: 1,542.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.56 : 2,121.24 = 1,118.56 : x
  2. Step 2: Convert to fraction form
    1,538.56/2,121.24 = 1,118.56/x
  3. Step 3: Cross multiply
    1,538.56x = 2,121.24 × 1,118.56
  4. Step 4: Simplify right side
    1,538.56x = 2,372,734.21
  5. Step 5: Solve for x
    x = 2,372,734.21/1,538.56
  6. Step 6: Final answer
    x = 1,542.18

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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.