Home / 1,112.16-1,668.06-381.72

Finding the Fourth Proportional to 1,112.16, 1,668.06 and 381.72

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Solution

The fourth proportional to 1,112.16, 1,668.06 and 381.72 is: 572.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.16 : 1,668.06 = 381.72 : x
  2. Step 2: Convert to fraction form
    1,112.16/1,668.06 = 381.72/x
  3. Step 3: Cross multiply
    1,112.16x = 1,668.06 × 381.72
  4. Step 4: Simplify right side
    1,112.16x = 636,731.86
  5. Step 5: Solve for x
    x = 636,731.86/1,112.16
  6. Step 6: Final answer
    x = 572.52

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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.