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Finding the Fourth Proportional to 281.26, 388.65 and 245.17

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Solution

The fourth proportional to 281.26, 388.65 and 245.17 is: 338.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.26 : 388.65 = 245.17 : x
  2. Step 2: Convert to fraction form
    281.26/388.65 = 245.17/x
  3. Step 3: Cross multiply
    281.26x = 388.65 × 245.17
  4. Step 4: Simplify right side
    281.26x = 95,285.32
  5. Step 5: Solve for x
    x = 95,285.32/281.26
  6. Step 6: Final answer
    x = 338.78

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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.