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Finding the Fourth Proportional to 277.68, 382.92 and 208.56

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Solution

The fourth proportional to 277.68, 382.92 and 208.56 is: 287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.68 : 382.92 = 208.56 : x
  2. Step 2: Convert to fraction form
    277.68/382.92 = 208.56/x
  3. Step 3: Cross multiply
    277.68x = 382.92 × 208.56
  4. Step 4: Simplify right side
    277.68x = 79,861.80
  5. Step 5: Solve for x
    x = 79,861.80/277.68
  6. Step 6: Final answer
    x = 287.60

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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.