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Finding the Fourth Proportional to 245.25, 338.45 and 151.95

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Solution

The fourth proportional to 245.25, 338.45 and 151.95 is: 209.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.25 : 338.45 = 151.95 : x
  2. Step 2: Convert to fraction form
    245.25/338.45 = 151.95/x
  3. Step 3: Cross multiply
    245.25x = 338.45 × 151.95
  4. Step 4: Simplify right side
    245.25x = 51,426.72
  5. Step 5: Solve for x
    x = 51,426.72/245.25
  6. Step 6: Final answer
    x = 209.69

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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.