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Finding the Fourth Proportional to 642.44, 961.62 and 446.43

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Solution

The fourth proportional to 642.44, 961.62 and 446.43 is: 668.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.44 : 961.62 = 446.43 : x
  2. Step 2: Convert to fraction form
    642.44/961.62 = 446.43/x
  3. Step 3: Cross multiply
    642.44x = 961.62 × 446.43
  4. Step 4: Simplify right side
    642.44x = 429,296.02
  5. Step 5: Solve for x
    x = 429,296.02/642.44
  6. Step 6: Final answer
    x = 668.23

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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.