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Finding the Fourth Proportional to 837.37, 1,155.33 and 659.78

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Solution

The fourth proportional to 837.37, 1,155.33 and 659.78 is: 910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.37 : 1,155.33 = 659.78 : x
  2. Step 2: Convert to fraction form
    837.37/1,155.33 = 659.78/x
  3. Step 3: Cross multiply
    837.37x = 1,155.33 × 659.78
  4. Step 4: Simplify right side
    837.37x = 762,257.85
  5. Step 5: Solve for x
    x = 762,257.85/837.37
  6. Step 6: Final answer
    x = 910.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.