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Finding the Fourth Proportional to 251.80, 347.34 and 181.78

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Solution

The fourth proportional to 251.80, 347.34 and 181.78 is: 250.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.80 : 347.34 = 181.78 : x
  2. Step 2: Convert to fraction form
    251.80/347.34 = 181.78/x
  3. Step 3: Cross multiply
    251.80x = 347.34 × 181.78
  4. Step 4: Simplify right side
    251.80x = 63,139.47
  5. Step 5: Solve for x
    x = 63,139.47/251.80
  6. Step 6: Final answer
    x = 250.75

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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.