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Finding the Fourth Proportional to 248.55, 343.01 and 211.70

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Solution

The fourth proportional to 248.55, 343.01 and 211.70 is: 292.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.55 : 343.01 = 211.70 : x
  2. Step 2: Convert to fraction form
    248.55/343.01 = 211.70/x
  3. Step 3: Cross multiply
    248.55x = 343.01 × 211.70
  4. Step 4: Simplify right side
    248.55x = 72,615.22
  5. Step 5: Solve for x
    x = 72,615.22/248.55
  6. Step 6: Final answer
    x = 292.16

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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.