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Finding the Fourth Proportional to 496.90, 685.51 and 300.30

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Solution

The fourth proportional to 496.90, 685.51 and 300.30 is: 414.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.90 : 685.51 = 300.30 : x
  2. Step 2: Convert to fraction form
    496.90/685.51 = 300.30/x
  3. Step 3: Cross multiply
    496.90x = 685.51 × 300.30
  4. Step 4: Simplify right side
    496.90x = 205,858.65
  5. Step 5: Solve for x
    x = 205,858.65/496.90
  6. Step 6: Final answer
    x = 414.29

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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.