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Finding the Fourth Proportional to 252.20, 349.06 and 245.80

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Solution

The fourth proportional to 252.20, 349.06 and 245.80 is: 340.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.20 : 349.06 = 245.80 : x
  2. Step 2: Convert to fraction form
    252.20/349.06 = 245.80/x
  3. Step 3: Cross multiply
    252.20x = 349.06 × 245.80
  4. Step 4: Simplify right side
    252.20x = 85,798.95
  5. Step 5: Solve for x
    x = 85,798.95/252.20
  6. Step 6: Final answer
    x = 340.20

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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.