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Finding the Fourth Proportional to 251.39, 346.68 and 153.05

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Solution

The fourth proportional to 251.39, 346.68 and 153.05 is: 211.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.39 : 346.68 = 153.05 : x
  2. Step 2: Convert to fraction form
    251.39/346.68 = 153.05/x
  3. Step 3: Cross multiply
    251.39x = 346.68 × 153.05
  4. Step 4: Simplify right side
    251.39x = 53,059.37
  5. Step 5: Solve for x
    x = 53,059.37/251.39
  6. Step 6: Final answer
    x = 211.06

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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.