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Finding the Fourth Proportional to 695.75, 1,044.16 and 330.80

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Solution

The fourth proportional to 695.75, 1,044.16 and 330.80 is: 496.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.75 : 1,044.16 = 330.80 : x
  2. Step 2: Convert to fraction form
    695.75/1,044.16 = 330.80/x
  3. Step 3: Cross multiply
    695.75x = 1,044.16 × 330.80
  4. Step 4: Simplify right side
    695.75x = 345,402.08
  5. Step 5: Solve for x
    x = 345,402.08/695.75
  6. Step 6: Final answer
    x = 496.45

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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.