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Finding the Fourth Proportional to 723.90, 998.97 and 409.17

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Solution

The fourth proportional to 723.90, 998.97 and 409.17 is: 564.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.90 : 998.97 = 409.17 : x
  2. Step 2: Convert to fraction form
    723.90/998.97 = 409.17/x
  3. Step 3: Cross multiply
    723.90x = 998.97 × 409.17
  4. Step 4: Simplify right side
    723.90x = 408,748.55
  5. Step 5: Solve for x
    x = 408,748.55/723.90
  6. Step 6: Final answer
    x = 564.65

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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.