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Finding the Fourth Proportional to 251.68, 347.22 and 153.46

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Solution

The fourth proportional to 251.68, 347.22 and 153.46 is: 211.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.68 : 347.22 = 153.46 : x
  2. Step 2: Convert to fraction form
    251.68/347.22 = 153.46/x
  3. Step 3: Cross multiply
    251.68x = 347.22 × 153.46
  4. Step 4: Simplify right side
    251.68x = 53,284.38
  5. Step 5: Solve for x
    x = 53,284.38/251.68
  6. Step 6: Final answer
    x = 211.71

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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.