Home / 1,542.22-2,128.26-879.06

Finding the Fourth Proportional to 1,542.22, 2,128.26 and 879.06

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Solution

The fourth proportional to 1,542.22, 2,128.26 and 879.06 is: 1,213.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.22 : 2,128.26 = 879.06 : x
  2. Step 2: Convert to fraction form
    1,542.22/2,128.26 = 879.06/x
  3. Step 3: Cross multiply
    1,542.22x = 2,128.26 × 879.06
  4. Step 4: Simplify right side
    1,542.22x = 1,870,868.24
  5. Step 5: Solve for x
    x = 1,870,868.24/1,542.22
  6. Step 6: Final answer
    x = 1,213.10

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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.