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Finding the Fourth Proportional to 286.19, 429.19 and 112.82

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Solution

The fourth proportional to 286.19, 429.19 and 112.82 is: 169.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.19 : 429.19 = 112.82 : x
  2. Step 2: Convert to fraction form
    286.19/429.19 = 112.82/x
  3. Step 3: Cross multiply
    286.19x = 429.19 × 112.82
  4. Step 4: Simplify right side
    286.19x = 48,418.79
  5. Step 5: Solve for x
    x = 48,418.79/286.19
  6. Step 6: Final answer
    x = 169.18

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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.