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Finding the Fourth Proportional to 611.41, 843.93 and 422.45

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Solution

The fourth proportional to 611.41, 843.93 and 422.45 is: 583.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.41 : 843.93 = 422.45 : x
  2. Step 2: Convert to fraction form
    611.41/843.93 = 422.45/x
  3. Step 3: Cross multiply
    611.41x = 843.93 × 422.45
  4. Step 4: Simplify right side
    611.41x = 356,517.17
  5. Step 5: Solve for x
    x = 356,517.17/611.41
  6. Step 6: Final answer
    x = 583.11

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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.