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Finding the Fourth Proportional to 2,179.73, 3,270.08 and 718.79

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Solution

The fourth proportional to 2,179.73, 3,270.08 and 718.79 is: 1,078.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.73 : 3,270.08 = 718.79 : x
  2. Step 2: Convert to fraction form
    2,179.73/3,270.08 = 718.79/x
  3. Step 3: Cross multiply
    2,179.73x = 3,270.08 × 718.79
  4. Step 4: Simplify right side
    2,179.73x = 2,350,480.86
  5. Step 5: Solve for x
    x = 2,350,480.86/2,179.73
  6. Step 6: Final answer
    x = 1,078.34

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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.