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Finding the Fourth Proportional to 200.69, 300.84 and 72.41

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Solution

The fourth proportional to 200.69, 300.84 and 72.41 is: 108.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.69 : 300.84 = 72.41 : x
  2. Step 2: Convert to fraction form
    200.69/300.84 = 72.41/x
  3. Step 3: Cross multiply
    200.69x = 300.84 × 72.41
  4. Step 4: Simplify right side
    200.69x = 21,783.82
  5. Step 5: Solve for x
    x = 21,783.82/200.69
  6. Step 6: Final answer
    x = 108.54

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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.