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Finding the Fourth Proportional to 836.77, 1,253.26 and 511.42

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Solution

The fourth proportional to 836.77, 1,253.26 and 511.42 is: 765.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.77 : 1,253.26 = 511.42 : x
  2. Step 2: Convert to fraction form
    836.77/1,253.26 = 511.42/x
  3. Step 3: Cross multiply
    836.77x = 1,253.26 × 511.42
  4. Step 4: Simplify right side
    836.77x = 640,942.23
  5. Step 5: Solve for x
    x = 640,942.23/836.77
  6. Step 6: Final answer
    x = 765.97

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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.