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Finding the Fourth Proportional to 1,181.72, 1,772.04 and 694.92

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Solution

The fourth proportional to 1,181.72, 1,772.04 and 694.92 is: 1,042.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.72 : 1,772.04 = 694.92 : x
  2. Step 2: Convert to fraction form
    1,181.72/1,772.04 = 694.92/x
  3. Step 3: Cross multiply
    1,181.72x = 1,772.04 × 694.92
  4. Step 4: Simplify right side
    1,181.72x = 1,231,426.04
  5. Step 5: Solve for x
    x = 1,231,426.04/1,181.72
  6. Step 6: Final answer
    x = 1,042.06

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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.