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Finding the Fourth Proportional to 286.26, 429.45 and 123.85

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Solution

The fourth proportional to 286.26, 429.45 and 123.85 is: 185.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.26 : 429.45 = 123.85 : x
  2. Step 2: Convert to fraction form
    286.26/429.45 = 123.85/x
  3. Step 3: Cross multiply
    286.26x = 429.45 × 123.85
  4. Step 4: Simplify right side
    286.26x = 53,187.38
  5. Step 5: Solve for x
    x = 53,187.38/286.26
  6. Step 6: Final answer
    x = 185.80

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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.