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Finding the Fourth Proportional to 152.20, 227.68 and 139.27

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Solution

The fourth proportional to 152.20, 227.68 and 139.27 is: 208.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.20 : 227.68 = 139.27 : x
  2. Step 2: Convert to fraction form
    152.20/227.68 = 139.27/x
  3. Step 3: Cross multiply
    152.20x = 227.68 × 139.27
  4. Step 4: Simplify right side
    152.20x = 31,708.99
  5. Step 5: Solve for x
    x = 31,708.99/152.20
  6. Step 6: Final answer
    x = 208.34

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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.