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Finding the Fourth Proportional to 385.22, 531.61 and 227.86

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Solution

The fourth proportional to 385.22, 531.61 and 227.86 is: 314.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.22 : 531.61 = 227.86 : x
  2. Step 2: Convert to fraction form
    385.22/531.61 = 227.86/x
  3. Step 3: Cross multiply
    385.22x = 531.61 × 227.86
  4. Step 4: Simplify right side
    385.22x = 121,132.65
  5. Step 5: Solve for x
    x = 121,132.65/385.22
  6. Step 6: Final answer
    x = 314.45

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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.