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Finding the Fourth Proportional to 836.82, 1,255.22 and 259.70

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Solution

The fourth proportional to 836.82, 1,255.22 and 259.70 is: 389.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.82 : 1,255.22 = 259.70 : x
  2. Step 2: Convert to fraction form
    836.82/1,255.22 = 259.70/x
  3. Step 3: Cross multiply
    836.82x = 1,255.22 × 259.70
  4. Step 4: Simplify right side
    836.82x = 325,973.06
  5. Step 5: Solve for x
    x = 325,973.06/836.82
  6. Step 6: Final answer
    x = 389.54

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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.