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Finding the Fourth Proportional to 2,175.78, 3,263.91 and 694.65

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Solution

The fourth proportional to 2,175.78, 3,263.91 and 694.65 is: 1,042.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.78 : 3,263.91 = 694.65 : x
  2. Step 2: Convert to fraction form
    2,175.78/3,263.91 = 694.65/x
  3. Step 3: Cross multiply
    2,175.78x = 3,263.91 × 694.65
  4. Step 4: Simplify right side
    2,175.78x = 2,267,284.72
  5. Step 5: Solve for x
    x = 2,267,284.72/2,175.78
  6. Step 6: Final answer
    x = 1,042.05

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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.