Home / 1,558.20-2,149.56-998.22

Finding the Fourth Proportional to 1,558.20, 2,149.56 and 998.22

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Solution

The fourth proportional to 1,558.20, 2,149.56 and 998.22 is: 1,377.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.20 : 2,149.56 = 998.22 : x
  2. Step 2: Convert to fraction form
    1,558.20/2,149.56 = 998.22/x
  3. Step 3: Cross multiply
    1,558.20x = 2,149.56 × 998.22
  4. Step 4: Simplify right side
    1,558.20x = 2,145,733.78
  5. Step 5: Solve for x
    x = 2,145,733.78/1,558.20
  6. Step 6: Final answer
    x = 1,377.06

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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.