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Finding the Fourth Proportional to 496.68, 685.43 and 275.65

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Solution

The fourth proportional to 496.68, 685.43 and 275.65 is: 380.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.68 : 685.43 = 275.65 : x
  2. Step 2: Convert to fraction form
    496.68/685.43 = 275.65/x
  3. Step 3: Cross multiply
    496.68x = 685.43 × 275.65
  4. Step 4: Simplify right side
    496.68x = 188,938.78
  5. Step 5: Solve for x
    x = 188,938.78/496.68
  6. Step 6: Final answer
    x = 380.40

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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.