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Finding the Fourth Proportional to 696.78, 960.62 and 447.68

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Solution

The fourth proportional to 696.78, 960.62 and 447.68 is: 617.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.78 : 960.62 = 447.68 : x
  2. Step 2: Convert to fraction form
    696.78/960.62 = 447.68/x
  3. Step 3: Cross multiply
    696.78x = 960.62 × 447.68
  4. Step 4: Simplify right side
    696.78x = 430,043.32
  5. Step 5: Solve for x
    x = 430,043.32/696.78
  6. Step 6: Final answer
    x = 617.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.