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Finding the Fourth Proportional to 2,279.88, 3,419.78 and 636.52

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Solution

The fourth proportional to 2,279.88, 3,419.78 and 636.52 is: 954.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.88 : 3,419.78 = 636.52 : x
  2. Step 2: Convert to fraction form
    2,279.88/3,419.78 = 636.52/x
  3. Step 3: Cross multiply
    2,279.88x = 3,419.78 × 636.52
  4. Step 4: Simplify right side
    2,279.88x = 2,176,758.37
  5. Step 5: Solve for x
    x = 2,176,758.37/2,279.88
  6. Step 6: Final answer
    x = 954.77

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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.