Home / 1,112.11-1,666.34-381.29

Finding the Fourth Proportional to 1,112.11, 1,666.34 and 381.29

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Solution

The fourth proportional to 1,112.11, 1,666.34 and 381.29 is: 571.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.11 : 1,666.34 = 381.29 : x
  2. Step 2: Convert to fraction form
    1,112.11/1,666.34 = 381.29/x
  3. Step 3: Cross multiply
    1,112.11x = 1,666.34 × 381.29
  4. Step 4: Simplify right side
    1,112.11x = 635,358.78
  5. Step 5: Solve for x
    x = 635,358.78/1,112.11
  6. Step 6: Final answer
    x = 571.31

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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.