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Finding the Fourth Proportional to 1,695.17, 2,540.34 and 768.44

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Solution

The fourth proportional to 1,695.17, 2,540.34 and 768.44 is: 1,151.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.17 : 2,540.34 = 768.44 : x
  2. Step 2: Convert to fraction form
    1,695.17/2,540.34 = 768.44/x
  3. Step 3: Cross multiply
    1,695.17x = 2,540.34 × 768.44
  4. Step 4: Simplify right side
    1,695.17x = 1,952,086.17
  5. Step 5: Solve for x
    x = 1,952,086.17/1,695.17
  6. Step 6: Final answer
    x = 1,151.56

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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.