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Finding the Fourth Proportional to 252.02, 378.08 and 206.80

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Solution

The fourth proportional to 252.02, 378.08 and 206.80 is: 310.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.02 : 378.08 = 206.80 : x
  2. Step 2: Convert to fraction form
    252.02/378.08 = 206.80/x
  3. Step 3: Cross multiply
    252.02x = 378.08 × 206.80
  4. Step 4: Simplify right side
    252.02x = 78,186.94
  5. Step 5: Solve for x
    x = 78,186.94/252.02
  6. Step 6: Final answer
    x = 310.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.