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Finding the Fourth Proportional to 5,270.78, 7,906.17 and 1,984.61

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Solution

The fourth proportional to 5,270.78, 7,906.17 and 1,984.61 is: 2,976.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,270.78 : 7,906.17 = 1,984.61 : x
  2. Step 2: Convert to fraction form
    5,270.78/7,906.17 = 1,984.61/x
  3. Step 3: Cross multiply
    5,270.78x = 7,906.17 × 1,984.61
  4. Step 4: Simplify right side
    5,270.78x = 15,690,624.51
  5. Step 5: Solve for x
    x = 15,690,624.51/5,270.78
  6. Step 6: Final answer
    x = 2,976.91

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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.