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Finding the Fourth Proportional to 722.89, 998.12 and 443.51

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Solution

The fourth proportional to 722.89, 998.12 and 443.51 is: 612.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.89 : 998.12 = 443.51 : x
  2. Step 2: Convert to fraction form
    722.89/998.12 = 443.51/x
  3. Step 3: Cross multiply
    722.89x = 998.12 × 443.51
  4. Step 4: Simplify right side
    722.89x = 442,668.99
  5. Step 5: Solve for x
    x = 442,668.99/722.89
  6. Step 6: Final answer
    x = 612.36

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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.