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Finding the Fourth Proportional to 389.22, 584.91 and 196.98

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Solution

The fourth proportional to 389.22, 584.91 and 196.98 is: 296.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.22 : 584.91 = 196.98 : x
  2. Step 2: Convert to fraction form
    389.22/584.91 = 196.98/x
  3. Step 3: Cross multiply
    389.22x = 584.91 × 196.98
  4. Step 4: Simplify right side
    389.22x = 115,215.57
  5. Step 5: Solve for x
    x = 115,215.57/389.22
  6. Step 6: Final answer
    x = 296.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.