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Finding the Fourth Proportional to 721.82, 995.67 and 442.10

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Solution

The fourth proportional to 721.82, 995.67 and 442.10 is: 609.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.82 : 995.67 = 442.10 : x
  2. Step 2: Convert to fraction form
    721.82/995.67 = 442.10/x
  3. Step 3: Cross multiply
    721.82x = 995.67 × 442.10
  4. Step 4: Simplify right side
    721.82x = 440,180.73
  5. Step 5: Solve for x
    x = 440,180.73/721.82
  6. Step 6: Final answer
    x = 609.82

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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.