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Finding the Fourth Proportional to 180.21, 247 and 177.78

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Solution

The fourth proportional to 180.21, 247 and 177.78 is: 243.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.21 : 247 = 177.78 : x
  2. Step 2: Convert to fraction form
    180.21/247 = 177.78/x
  3. Step 3: Cross multiply
    180.21x = 247 × 177.78
  4. Step 4: Simplify right side
    180.21x = 43,911.66
  5. Step 5: Solve for x
    x = 43,911.66/180.21
  6. Step 6: Final answer
    x = 243.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.