Home / 1,542.11-2,128.09-843.48

Finding the Fourth Proportional to 1,542.11, 2,128.09 and 843.48

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Solution

The fourth proportional to 1,542.11, 2,128.09 and 843.48 is: 1,163.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.11 : 2,128.09 = 843.48 : x
  2. Step 2: Convert to fraction form
    1,542.11/2,128.09 = 843.48/x
  3. Step 3: Cross multiply
    1,542.11x = 2,128.09 × 843.48
  4. Step 4: Simplify right side
    1,542.11x = 1,795,001.35
  5. Step 5: Solve for x
    x = 1,795,001.35/1,542.11
  6. Step 6: Final answer
    x = 1,163.99

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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.