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Finding the Fourth Proportional to 244.45, 366.72 and 128.80

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Solution

The fourth proportional to 244.45, 366.72 and 128.80 is: 193.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    244.45 : 366.72 = 128.80 : x
  2. Step 2: Convert to fraction form
    244.45/366.72 = 128.80/x
  3. Step 3: Cross multiply
    244.45x = 366.72 × 128.80
  4. Step 4: Simplify right side
    244.45x = 47,233.54
  5. Step 5: Solve for x
    x = 47,233.54/244.45
  6. Step 6: Final answer
    x = 193.22

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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.