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Finding the Fourth Proportional to 386.11, 579.27 and 112.23

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Solution

The fourth proportional to 386.11, 579.27 and 112.23 is: 168.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.11 : 579.27 = 112.23 : x
  2. Step 2: Convert to fraction form
    386.11/579.27 = 112.23/x
  3. Step 3: Cross multiply
    386.11x = 579.27 × 112.23
  4. Step 4: Simplify right side
    386.11x = 65,011.47
  5. Step 5: Solve for x
    x = 65,011.47/386.11
  6. Step 6: Final answer
    x = 168.38

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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.