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Finding the Fourth Proportional to 251.36, 346.78 and 153.08

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Solution

The fourth proportional to 251.36, 346.78 and 153.08 is: 211.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.36 : 346.78 = 153.08 : x
  2. Step 2: Convert to fraction form
    251.36/346.78 = 153.08/x
  3. Step 3: Cross multiply
    251.36x = 346.78 × 153.08
  4. Step 4: Simplify right side
    251.36x = 53,085.08
  5. Step 5: Solve for x
    x = 53,085.08/251.36
  6. Step 6: Final answer
    x = 211.19

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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.