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Finding the Fourth Proportional to 248.82, 343.38 and 155.58

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Solution

The fourth proportional to 248.82, 343.38 and 155.58 is: 214.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.82 : 343.38 = 155.58 : x
  2. Step 2: Convert to fraction form
    248.82/343.38 = 155.58/x
  3. Step 3: Cross multiply
    248.82x = 343.38 × 155.58
  4. Step 4: Simplify right side
    248.82x = 53,423.06
  5. Step 5: Solve for x
    x = 53,423.06/248.82
  6. Step 6: Final answer
    x = 214.71

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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.