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Finding the Fourth Proportional to 317.45, 476.38 and 163.42

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Solution

The fourth proportional to 317.45, 476.38 and 163.42 is: 245.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.45 : 476.38 = 163.42 : x
  2. Step 2: Convert to fraction form
    317.45/476.38 = 163.42/x
  3. Step 3: Cross multiply
    317.45x = 476.38 × 163.42
  4. Step 4: Simplify right side
    317.45x = 77,849.03
  5. Step 5: Solve for x
    x = 77,849.03/317.45
  6. Step 6: Final answer
    x = 245.23

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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.