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Finding the Fourth Proportional to 389.74, 584.42 and 227.48

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Solution

The fourth proportional to 389.74, 584.42 and 227.48 is: 341.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.74 : 584.42 = 227.48 : x
  2. Step 2: Convert to fraction form
    389.74/584.42 = 227.48/x
  3. Step 3: Cross multiply
    389.74x = 584.42 × 227.48
  4. Step 4: Simplify right side
    389.74x = 132,943.86
  5. Step 5: Solve for x
    x = 132,943.86/389.74
  6. Step 6: Final answer
    x = 341.11

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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.