Home / 1,112.10-1,668.27-381.59

Finding the Fourth Proportional to 1,112.10, 1,668.27 and 381.59

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Solution

The fourth proportional to 1,112.10, 1,668.27 and 381.59 is: 572.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.10 : 1,668.27 = 381.59 : x
  2. Step 2: Convert to fraction form
    1,112.10/1,668.27 = 381.59/x
  3. Step 3: Cross multiply
    1,112.10x = 1,668.27 × 381.59
  4. Step 4: Simplify right side
    1,112.10x = 636,588.73
  5. Step 5: Solve for x
    x = 636,588.73/1,112.10
  6. Step 6: Final answer
    x = 572.42

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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.