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Finding the Fourth Proportional to 286.35, 429.52 and 69.92

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Solution

The fourth proportional to 286.35, 429.52 and 69.92 is: 104.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.35 : 429.52 = 69.92 : x
  2. Step 2: Convert to fraction form
    286.35/429.52 = 69.92/x
  3. Step 3: Cross multiply
    286.35x = 429.52 × 69.92
  4. Step 4: Simplify right side
    286.35x = 30,032.04
  5. Step 5: Solve for x
    x = 30,032.04/286.35
  6. Step 6: Final answer
    x = 104.88

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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.