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Finding the Fourth Proportional to 2,279.96, 3,420.05 and 636.60

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Solution

The fourth proportional to 2,279.96, 3,420.05 and 636.60 is: 954.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.96 : 3,420.05 = 636.60 : x
  2. Step 2: Convert to fraction form
    2,279.96/3,420.05 = 636.60/x
  3. Step 3: Cross multiply
    2,279.96x = 3,420.05 × 636.60
  4. Step 4: Simplify right side
    2,279.96x = 2,177,203.83
  5. Step 5: Solve for x
    x = 2,177,203.83/2,279.96
  6. Step 6: Final answer
    x = 954.93

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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.