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Finding the Fourth Proportional to 496.89, 685.70 and 275.84

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Solution

The fourth proportional to 496.89, 685.70 and 275.84 is: 380.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.89 : 685.70 = 275.84 : x
  2. Step 2: Convert to fraction form
    496.89/685.70 = 275.84/x
  3. Step 3: Cross multiply
    496.89x = 685.70 × 275.84
  4. Step 4: Simplify right side
    496.89x = 189,142.11
  5. Step 5: Solve for x
    x = 189,142.11/496.89
  6. Step 6: Final answer
    x = 380.65

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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.