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Finding the Fourth Proportional to 721.99, 995.84 and 438.41

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Solution

The fourth proportional to 721.99, 995.84 and 438.41 is: 604.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.99 : 995.84 = 438.41 : x
  2. Step 2: Convert to fraction form
    721.99/995.84 = 438.41/x
  3. Step 3: Cross multiply
    721.99x = 995.84 × 438.41
  4. Step 4: Simplify right side
    721.99x = 436,581.24
  5. Step 5: Solve for x
    x = 436,581.24/721.99
  6. Step 6: Final answer
    x = 604.69

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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.