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Finding the Fourth Proportional to 611.19, 843.21 and 401.58

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Solution

The fourth proportional to 611.19, 843.21 and 401.58 is: 554.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.19 : 843.21 = 401.58 : x
  2. Step 2: Convert to fraction form
    611.19/843.21 = 401.58/x
  3. Step 3: Cross multiply
    611.19x = 843.21 × 401.58
  4. Step 4: Simplify right side
    611.19x = 338,616.27
  5. Step 5: Solve for x
    x = 338,616.27/611.19
  6. Step 6: Final answer
    x = 554.03

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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.