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Finding the Fourth Proportional to 389.71, 584.34 and 194.48

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Solution

The fourth proportional to 389.71, 584.34 and 194.48 is: 291.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.71 : 584.34 = 194.48 : x
  2. Step 2: Convert to fraction form
    389.71/584.34 = 194.48/x
  3. Step 3: Cross multiply
    389.71x = 584.34 × 194.48
  4. Step 4: Simplify right side
    389.71x = 113,642.44
  5. Step 5: Solve for x
    x = 113,642.44/389.71
  6. Step 6: Final answer
    x = 291.61

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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.