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Finding the Fourth Proportional to 270.87, 406.17 and 108.57

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Solution

The fourth proportional to 270.87, 406.17 and 108.57 is: 162.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.87 : 406.17 = 108.57 : x
  2. Step 2: Convert to fraction form
    270.87/406.17 = 108.57/x
  3. Step 3: Cross multiply
    270.87x = 406.17 × 108.57
  4. Step 4: Simplify right side
    270.87x = 44,097.88
  5. Step 5: Solve for x
    x = 44,097.88/270.87
  6. Step 6: Final answer
    x = 162.80

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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.