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Finding the Fourth Proportional to 251.82, 347.64 and 158.61

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Solution

The fourth proportional to 251.82, 347.64 and 158.61 is: 218.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.82 : 347.64 = 158.61 : x
  2. Step 2: Convert to fraction form
    251.82/347.64 = 158.61/x
  3. Step 3: Cross multiply
    251.82x = 347.64 × 158.61
  4. Step 4: Simplify right side
    251.82x = 55,139.65
  5. Step 5: Solve for x
    x = 55,139.65/251.82
  6. Step 6: Final answer
    x = 218.96

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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.