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Finding the Fourth Proportional to 696.44, 961.18 and 416.78

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Solution

The fourth proportional to 696.44, 961.18 and 416.78 is: 575.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.44 : 961.18 = 416.78 : x
  2. Step 2: Convert to fraction form
    696.44/961.18 = 416.78/x
  3. Step 3: Cross multiply
    696.44x = 961.18 × 416.78
  4. Step 4: Simplify right side
    696.44x = 400,600.60
  5. Step 5: Solve for x
    x = 400,600.60/696.44
  6. Step 6: Final answer
    x = 575.21

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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.