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Finding the Fourth Proportional to 611.82, 844.43 and 346.40

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Solution

The fourth proportional to 611.82, 844.43 and 346.40 is: 478.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.82 : 844.43 = 346.40 : x
  2. Step 2: Convert to fraction form
    611.82/844.43 = 346.40/x
  3. Step 3: Cross multiply
    611.82x = 844.43 × 346.40
  4. Step 4: Simplify right side
    611.82x = 292,504.60
  5. Step 5: Solve for x
    x = 292,504.60/611.82
  6. Step 6: Final answer
    x = 478.09

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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.