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Finding the Fourth Proportional to 2,155.78, 3,233.70 and 694.96

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Solution

The fourth proportional to 2,155.78, 3,233.70 and 694.96 is: 1,042.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.78 : 3,233.70 = 694.96 : x
  2. Step 2: Convert to fraction form
    2,155.78/3,233.70 = 694.96/x
  3. Step 3: Cross multiply
    2,155.78x = 3,233.70 × 694.96
  4. Step 4: Simplify right side
    2,155.78x = 2,247,292.15
  5. Step 5: Solve for x
    x = 2,247,292.15/2,155.78
  6. Step 6: Final answer
    x = 1,042.45

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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.