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Finding the Fourth Proportional to 1,796.45, 2,694.77 and 642.20

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Solution

The fourth proportional to 1,796.45, 2,694.77 and 642.20 is: 963.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,796.45 : 2,694.77 = 642.20 : x
  2. Step 2: Convert to fraction form
    1,796.45/2,694.77 = 642.20/x
  3. Step 3: Cross multiply
    1,796.45x = 2,694.77 × 642.20
  4. Step 4: Simplify right side
    1,796.45x = 1,730,564.61
  5. Step 5: Solve for x
    x = 1,730,564.61/1,796.45
  6. Step 6: Final answer
    x = 963.33

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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.