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Finding the Fourth Proportional to 248.28, 342.36 and 211.38

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Solution

The fourth proportional to 248.28, 342.36 and 211.38 is: 291.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.28 : 342.36 = 211.38 : x
  2. Step 2: Convert to fraction form
    248.28/342.36 = 211.38/x
  3. Step 3: Cross multiply
    248.28x = 342.36 × 211.38
  4. Step 4: Simplify right side
    248.28x = 72,368.06
  5. Step 5: Solve for x
    x = 72,368.06/248.28
  6. Step 6: Final answer
    x = 291.48

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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.