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Finding the Fourth Proportional to 496.43, 685.07 and 299.91

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Solution

The fourth proportional to 496.43, 685.07 and 299.91 is: 413.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.43 : 685.07 = 299.91 : x
  2. Step 2: Convert to fraction form
    496.43/685.07 = 299.91/x
  3. Step 3: Cross multiply
    496.43x = 685.07 × 299.91
  4. Step 4: Simplify right side
    496.43x = 205,457.52
  5. Step 5: Solve for x
    x = 205,457.52/496.43
  6. Step 6: Final answer
    x = 413.87

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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.