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Finding the Fourth Proportional to 320.72, 442.60 and 180.84

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Solution

The fourth proportional to 320.72, 442.60 and 180.84 is: 249.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.72 : 442.60 = 180.84 : x
  2. Step 2: Convert to fraction form
    320.72/442.60 = 180.84/x
  3. Step 3: Cross multiply
    320.72x = 442.60 × 180.84
  4. Step 4: Simplify right side
    320.72x = 80,039.78
  5. Step 5: Solve for x
    x = 80,039.78/320.72
  6. Step 6: Final answer
    x = 249.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.