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Finding the Fourth Proportional to 611.25, 843.62 and 401.34

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Solution

The fourth proportional to 611.25, 843.62 and 401.34 is: 553.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.25 : 843.62 = 401.34 : x
  2. Step 2: Convert to fraction form
    611.25/843.62 = 401.34/x
  3. Step 3: Cross multiply
    611.25x = 843.62 × 401.34
  4. Step 4: Simplify right side
    611.25x = 338,578.45
  5. Step 5: Solve for x
    x = 338,578.45/611.25
  6. Step 6: Final answer
    x = 553.91

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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.