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Finding the Fourth Proportional to 836.25, 1,252.91 and 445.43

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Solution

The fourth proportional to 836.25, 1,252.91 and 445.43 is: 667.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.25 : 1,252.91 = 445.43 : x
  2. Step 2: Convert to fraction form
    836.25/1,252.91 = 445.43/x
  3. Step 3: Cross multiply
    836.25x = 1,252.91 × 445.43
  4. Step 4: Simplify right side
    836.25x = 558,077.44
  5. Step 5: Solve for x
    x = 558,077.44/836.25
  6. Step 6: Final answer
    x = 667.36

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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.