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Finding the Fourth Proportional to 496.79, 685.49 and 275.71

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Solution

The fourth proportional to 496.79, 685.49 and 275.71 is: 380.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.79 : 685.49 = 275.71 : x
  2. Step 2: Convert to fraction form
    496.79/685.49 = 275.71/x
  3. Step 3: Cross multiply
    496.79x = 685.49 × 275.71
  4. Step 4: Simplify right side
    496.79x = 188,996.45
  5. Step 5: Solve for x
    x = 188,996.45/496.79
  6. Step 6: Final answer
    x = 380.44

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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.