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Finding the Fourth Proportional to 496.91, 685.71 and 275.85

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Solution

The fourth proportional to 496.91, 685.71 and 275.85 is: 380.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.91 : 685.71 = 275.85 : x
  2. Step 2: Convert to fraction form
    496.91/685.71 = 275.85/x
  3. Step 3: Cross multiply
    496.91x = 685.71 × 275.85
  4. Step 4: Simplify right side
    496.91x = 189,153.10
  5. Step 5: Solve for x
    x = 189,153.10/496.91
  6. Step 6: Final answer
    x = 380.66

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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.