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Finding the Fourth Proportional to 251.27, 346.85 and 158

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Solution

The fourth proportional to 251.27, 346.85 and 158 is: 218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.27 : 346.85 = 158 : x
  2. Step 2: Convert to fraction form
    251.27/346.85 = 158/x
  3. Step 3: Cross multiply
    251.27x = 346.85 × 158
  4. Step 4: Simplify right side
    251.27x = 54,802.30
  5. Step 5: Solve for x
    x = 54,802.30/251.27
  6. Step 6: Final answer
    x = 218.10

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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.