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Finding the Fourth Proportional to 245.25, 338.99 and 220.41

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Solution

The fourth proportional to 245.25, 338.99 and 220.41 is: 304.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.25 : 338.99 = 220.41 : x
  2. Step 2: Convert to fraction form
    245.25/338.99 = 220.41/x
  3. Step 3: Cross multiply
    245.25x = 338.99 × 220.41
  4. Step 4: Simplify right side
    245.25x = 74,715.68
  5. Step 5: Solve for x
    x = 74,715.68/245.25
  6. Step 6: Final answer
    x = 304.65

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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.