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Finding the Fourth Proportional to 270.22, 404.57 and 212.71

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Solution

The fourth proportional to 270.22, 404.57 and 212.71 is: 318.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.22 : 404.57 = 212.71 : x
  2. Step 2: Convert to fraction form
    270.22/404.57 = 212.71/x
  3. Step 3: Cross multiply
    270.22x = 404.57 × 212.71
  4. Step 4: Simplify right side
    270.22x = 86,056.08
  5. Step 5: Solve for x
    x = 86,056.08/270.22
  6. Step 6: Final answer
    x = 318.47

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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.