Home / 1,542.24-2,128.17-879.09

Finding the Fourth Proportional to 1,542.24, 2,128.17 and 879.09

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Solution

The fourth proportional to 1,542.24, 2,128.17 and 879.09 is: 1,213.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.24 : 2,128.17 = 879.09 : x
  2. Step 2: Convert to fraction form
    1,542.24/2,128.17 = 879.09/x
  3. Step 3: Cross multiply
    1,542.24x = 2,128.17 × 879.09
  4. Step 4: Simplify right side
    1,542.24x = 1,870,852.97
  5. Step 5: Solve for x
    x = 1,870,852.97/1,542.24
  6. Step 6: Final answer
    x = 1,213.08

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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.