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Finding the Fourth Proportional to 286.71, 429.71 and 132.43

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Solution

The fourth proportional to 286.71, 429.71 and 132.43 is: 198.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.71 : 429.71 = 132.43 : x
  2. Step 2: Convert to fraction form
    286.71/429.71 = 132.43/x
  3. Step 3: Cross multiply
    286.71x = 429.71 × 132.43
  4. Step 4: Simplify right side
    286.71x = 56,905.75
  5. Step 5: Solve for x
    x = 56,905.75/286.71
  6. Step 6: Final answer
    x = 198.48

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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.