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Finding the Fourth Proportional to 496.65, 685.31 and 300.18

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Solution

The fourth proportional to 496.65, 685.31 and 300.18 is: 414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.65 : 685.31 = 300.18 : x
  2. Step 2: Convert to fraction form
    496.65/685.31 = 300.18/x
  3. Step 3: Cross multiply
    496.65x = 685.31 × 300.18
  4. Step 4: Simplify right side
    496.65x = 205,714.85
  5. Step 5: Solve for x
    x = 205,714.85/496.65
  6. Step 6: Final answer
    x = 414.20

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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.