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Finding the Fourth Proportional to 270.86, 406.28 and 217.10

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Solution

The fourth proportional to 270.86, 406.28 and 217.10 is: 325.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.86 : 406.28 = 217.10 : x
  2. Step 2: Convert to fraction form
    270.86/406.28 = 217.10/x
  3. Step 3: Cross multiply
    270.86x = 406.28 × 217.10
  4. Step 4: Simplify right side
    270.86x = 88,201.36
  5. Step 5: Solve for x
    x = 88,201.36/270.86
  6. Step 6: Final answer
    x = 325.63

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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.