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Finding the Fourth Proportional to 837.38, 1,255.66 and 490.80

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Solution

The fourth proportional to 837.38, 1,255.66 and 490.80 is: 735.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.38 : 1,255.66 = 490.80 : x
  2. Step 2: Convert to fraction form
    837.38/1,255.66 = 490.80/x
  3. Step 3: Cross multiply
    837.38x = 1,255.66 × 490.80
  4. Step 4: Simplify right side
    837.38x = 616,277.93
  5. Step 5: Solve for x
    x = 616,277.93/837.38
  6. Step 6: Final answer
    x = 735.96

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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.