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Finding the Fourth Proportional to 251.39, 346.97 and 153.20

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Solution

The fourth proportional to 251.39, 346.97 and 153.20 is: 211.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.39 : 346.97 = 153.20 : x
  2. Step 2: Convert to fraction form
    251.39/346.97 = 153.20/x
  3. Step 3: Cross multiply
    251.39x = 346.97 × 153.20
  4. Step 4: Simplify right side
    251.39x = 53,154.45
  5. Step 5: Solve for x
    x = 53,154.45/251.39
  6. Step 6: Final answer
    x = 211.45

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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.