Home / 1,127.49-1,691.37-387.23

Finding the Fourth Proportional to 1,127.49, 1,691.37 and 387.23

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Solution

The fourth proportional to 1,127.49, 1,691.37 and 387.23 is: 580.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.49 : 1,691.37 = 387.23 : x
  2. Step 2: Convert to fraction form
    1,127.49/1,691.37 = 387.23/x
  3. Step 3: Cross multiply
    1,127.49x = 1,691.37 × 387.23
  4. Step 4: Simplify right side
    1,127.49x = 654,940.75
  5. Step 5: Solve for x
    x = 654,940.75/1,127.49
  6. Step 6: Final answer
    x = 580.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.