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Finding the Fourth Proportional to 253.54, 378.56 and 251.08

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Solution

The fourth proportional to 253.54, 378.56 and 251.08 is: 374.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.54 : 378.56 = 251.08 : x
  2. Step 2: Convert to fraction form
    253.54/378.56 = 251.08/x
  3. Step 3: Cross multiply
    253.54x = 378.56 × 251.08
  4. Step 4: Simplify right side
    253.54x = 95,048.84
  5. Step 5: Solve for x
    x = 95,048.84/253.54
  6. Step 6: Final answer
    x = 374.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.