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Finding the Fourth Proportional to 286.26, 429.33 and 103.63

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Solution

The fourth proportional to 286.26, 429.33 and 103.63 is: 155.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.26 : 429.33 = 103.63 : x
  2. Step 2: Convert to fraction form
    286.26/429.33 = 103.63/x
  3. Step 3: Cross multiply
    286.26x = 429.33 × 103.63
  4. Step 4: Simplify right side
    286.26x = 44,491.47
  5. Step 5: Solve for x
    x = 44,491.47/286.26
  6. Step 6: Final answer
    x = 155.42

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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.