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Finding the Fourth Proportional to 836.92, 1,255.74 and 511.48

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Solution

The fourth proportional to 836.92, 1,255.74 and 511.48 is: 767.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.92 : 1,255.74 = 511.48 : x
  2. Step 2: Convert to fraction form
    836.92/1,255.74 = 511.48/x
  3. Step 3: Cross multiply
    836.92x = 1,255.74 × 511.48
  4. Step 4: Simplify right side
    836.92x = 642,285.90
  5. Step 5: Solve for x
    x = 642,285.90/836.92
  6. Step 6: Final answer
    x = 767.44

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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.