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Finding the Fourth Proportional to 275.71, 380.64 and 205.69

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Solution

The fourth proportional to 275.71, 380.64 and 205.69 is: 283.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.71 : 380.64 = 205.69 : x
  2. Step 2: Convert to fraction form
    275.71/380.64 = 205.69/x
  3. Step 3: Cross multiply
    275.71x = 380.64 × 205.69
  4. Step 4: Simplify right side
    275.71x = 78,293.84
  5. Step 5: Solve for x
    x = 78,293.84/275.71
  6. Step 6: Final answer
    x = 283.97

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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.