Home / 1,112.18-1,668.44-381.56

Finding the Fourth Proportional to 1,112.18, 1,668.44 and 381.56

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Solution

The fourth proportional to 1,112.18, 1,668.44 and 381.56 is: 572.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.18 : 1,668.44 = 381.56 : x
  2. Step 2: Convert to fraction form
    1,112.18/1,668.44 = 381.56/x
  3. Step 3: Cross multiply
    1,112.18x = 1,668.44 × 381.56
  4. Step 4: Simplify right side
    1,112.18x = 636,612.23
  5. Step 5: Solve for x
    x = 636,612.23/1,112.18
  6. Step 6: Final answer
    x = 572.40

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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.