Home / 1,542.28-2,127.70-1,076.80

Finding the Fourth Proportional to 1,542.28, 2,127.70 and 1,076.80

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Solution

The fourth proportional to 1,542.28, 2,127.70 and 1,076.80 is: 1,485.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.28 : 2,127.70 = 1,076.80 : x
  2. Step 2: Convert to fraction form
    1,542.28/2,127.70 = 1,076.80/x
  3. Step 3: Cross multiply
    1,542.28x = 2,127.70 × 1,076.80
  4. Step 4: Simplify right side
    1,542.28x = 2,291,107.36
  5. Step 5: Solve for x
    x = 2,291,107.36/1,542.28
  6. Step 6: Final answer
    x = 1,485.53

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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.