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Finding the Fourth Proportional to 611.04, 843.34 and 401.20

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Solution

The fourth proportional to 611.04, 843.34 and 401.20 is: 553.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.04 : 843.34 = 401.20 : x
  2. Step 2: Convert to fraction form
    611.04/843.34 = 401.20/x
  3. Step 3: Cross multiply
    611.04x = 843.34 × 401.20
  4. Step 4: Simplify right side
    611.04x = 338,348.01
  5. Step 5: Solve for x
    x = 338,348.01/611.04
  6. Step 6: Final answer
    x = 553.72

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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.