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Finding the Fourth Proportional to 416.14, 623.28 and 253.42

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Solution

The fourth proportional to 416.14, 623.28 and 253.42 is: 379.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.14 : 623.28 = 253.42 : x
  2. Step 2: Convert to fraction form
    416.14/623.28 = 253.42/x
  3. Step 3: Cross multiply
    416.14x = 623.28 × 253.42
  4. Step 4: Simplify right side
    416.14x = 157,951.62
  5. Step 5: Solve for x
    x = 157,951.62/416.14
  6. Step 6: Final answer
    x = 379.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.