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Finding the Fourth Proportional to 180.37, 270.56 and 139.67

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Solution

The fourth proportional to 180.37, 270.56 and 139.67 is: 209.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.37 : 270.56 = 139.67 : x
  2. Step 2: Convert to fraction form
    180.37/270.56 = 139.67/x
  3. Step 3: Cross multiply
    180.37x = 270.56 × 139.67
  4. Step 4: Simplify right side
    180.37x = 37,789.12
  5. Step 5: Solve for x
    x = 37,789.12/180.37
  6. Step 6: Final answer
    x = 209.51

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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.