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Finding the Fourth Proportional to 248.05, 342.03 and 211.33

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Solution

The fourth proportional to 248.05, 342.03 and 211.33 is: 291.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.05 : 342.03 = 211.33 : x
  2. Step 2: Convert to fraction form
    248.05/342.03 = 211.33/x
  3. Step 3: Cross multiply
    248.05x = 342.03 × 211.33
  4. Step 4: Simplify right side
    248.05x = 72,281.20
  5. Step 5: Solve for x
    x = 72,281.20/248.05
  6. Step 6: Final answer
    x = 291.40

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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.