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Finding the Fourth Proportional to 251.37, 346.78 and 153.12

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Solution

The fourth proportional to 251.37, 346.78 and 153.12 is: 211.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.37 : 346.78 = 153.12 : x
  2. Step 2: Convert to fraction form
    251.37/346.78 = 153.12/x
  3. Step 3: Cross multiply
    251.37x = 346.78 × 153.12
  4. Step 4: Simplify right side
    251.37x = 53,096.45
  5. Step 5: Solve for x
    x = 53,096.45/251.37
  6. Step 6: Final answer
    x = 211.23

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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.