Home / 1,542.24-2,127.96-879.12

Finding the Fourth Proportional to 1,542.24, 2,127.96 and 879.12

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Solution

The fourth proportional to 1,542.24, 2,127.96 and 879.12 is: 1,213.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.24 : 2,127.96 = 879.12 : x
  2. Step 2: Convert to fraction form
    1,542.24/2,127.96 = 879.12/x
  3. Step 3: Cross multiply
    1,542.24x = 2,127.96 × 879.12
  4. Step 4: Simplify right side
    1,542.24x = 1,870,732.20
  5. Step 5: Solve for x
    x = 1,870,732.20/1,542.24
  6. Step 6: Final answer
    x = 1,213.00

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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.