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Finding the Fourth Proportional to 272.43, 407.61 and 195.57

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Solution

The fourth proportional to 272.43, 407.61 and 195.57 is: 292.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.43 : 407.61 = 195.57 : x
  2. Step 2: Convert to fraction form
    272.43/407.61 = 195.57/x
  3. Step 3: Cross multiply
    272.43x = 407.61 × 195.57
  4. Step 4: Simplify right side
    272.43x = 79,716.29
  5. Step 5: Solve for x
    x = 79,716.29/272.43
  6. Step 6: Final answer
    x = 292.61

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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.