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Finding the Fourth Proportional to 611.90, 844.36 and 349.90

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Solution

The fourth proportional to 611.90, 844.36 and 349.90 is: 482.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.90 : 844.36 = 349.90 : x
  2. Step 2: Convert to fraction form
    611.90/844.36 = 349.90/x
  3. Step 3: Cross multiply
    611.90x = 844.36 × 349.90
  4. Step 4: Simplify right side
    611.90x = 295,441.56
  5. Step 5: Solve for x
    x = 295,441.56/611.90
  6. Step 6: Final answer
    x = 482.83

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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.