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Finding the Fourth Proportional to 251.04, 378.72 and 248.16

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Solution

The fourth proportional to 251.04, 378.72 and 248.16 is: 374.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.04 : 378.72 = 248.16 : x
  2. Step 2: Convert to fraction form
    251.04/378.72 = 248.16/x
  3. Step 3: Cross multiply
    251.04x = 378.72 × 248.16
  4. Step 4: Simplify right side
    251.04x = 93,983.16
  5. Step 5: Solve for x
    x = 93,983.16/251.04
  6. Step 6: Final answer
    x = 374.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.