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Finding the Fourth Proportional to 496.75, 685.41 and 310.18

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Solution

The fourth proportional to 496.75, 685.41 and 310.18 is: 427.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.75 : 685.41 = 310.18 : x
  2. Step 2: Convert to fraction form
    496.75/685.41 = 310.18/x
  3. Step 3: Cross multiply
    496.75x = 685.41 × 310.18
  4. Step 4: Simplify right side
    496.75x = 212,600.47
  5. Step 5: Solve for x
    x = 212,600.47/496.75
  6. Step 6: Final answer
    x = 427.98

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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.