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Finding the Fourth Proportional to 249.64, 345.06 and 211.24

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Solution

The fourth proportional to 249.64, 345.06 and 211.24 is: 291.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.64 : 345.06 = 211.24 : x
  2. Step 2: Convert to fraction form
    249.64/345.06 = 211.24/x
  3. Step 3: Cross multiply
    249.64x = 345.06 × 211.24
  4. Step 4: Simplify right side
    249.64x = 72,890.47
  5. Step 5: Solve for x
    x = 72,890.47/249.64
  6. Step 6: Final answer
    x = 291.98

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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.