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Finding the Fourth Proportional to 561.11, 774.16 and 324.97

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Solution

The fourth proportional to 561.11, 774.16 and 324.97 is: 448.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.11 : 774.16 = 324.97 : x
  2. Step 2: Convert to fraction form
    561.11/774.16 = 324.97/x
  3. Step 3: Cross multiply
    561.11x = 774.16 × 324.97
  4. Step 4: Simplify right side
    561.11x = 251,578.78
  5. Step 5: Solve for x
    x = 251,578.78/561.11
  6. Step 6: Final answer
    x = 448.36

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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.