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Finding the Fourth Proportional to 242.87, 364.28 and 80.54

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Solution

The fourth proportional to 242.87, 364.28 and 80.54 is: 120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.87 : 364.28 = 80.54 : x
  2. Step 2: Convert to fraction form
    242.87/364.28 = 80.54/x
  3. Step 3: Cross multiply
    242.87x = 364.28 × 80.54
  4. Step 4: Simplify right side
    242.87x = 29,336.89
  5. Step 5: Solve for x
    x = 29,336.89/242.87
  6. Step 6: Final answer
    x = 120.80

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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.