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Finding the Fourth Proportional to 247.44, 373.17 and 211.80

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Solution

The fourth proportional to 247.44, 373.17 and 211.80 is: 319.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.44 : 373.17 = 211.80 : x
  2. Step 2: Convert to fraction form
    247.44/373.17 = 211.80/x
  3. Step 3: Cross multiply
    247.44x = 373.17 × 211.80
  4. Step 4: Simplify right side
    247.44x = 79,037.41
  5. Step 5: Solve for x
    x = 79,037.41/247.44
  6. Step 6: Final answer
    x = 319.42

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.