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Finding the Fourth Proportional to 496.95, 685.61 and 300.39

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Solution

The fourth proportional to 496.95, 685.61 and 300.39 is: 414.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.95 : 685.61 = 300.39 : x
  2. Step 2: Convert to fraction form
    496.95/685.61 = 300.39/x
  3. Step 3: Cross multiply
    496.95x = 685.61 × 300.39
  4. Step 4: Simplify right side
    496.95x = 205,950.39
  5. Step 5: Solve for x
    x = 205,950.39/496.95
  6. Step 6: Final answer
    x = 414.43

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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.