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Finding the Fourth Proportional to 317.71, 476.75 and 144.42

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Solution

The fourth proportional to 317.71, 476.75 and 144.42 is: 216.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.71 : 476.75 = 144.42 : x
  2. Step 2: Convert to fraction form
    317.71/476.75 = 144.42/x
  3. Step 3: Cross multiply
    317.71x = 476.75 × 144.42
  4. Step 4: Simplify right side
    317.71x = 68,850.81
  5. Step 5: Solve for x
    x = 68,850.81/317.71
  6. Step 6: Final answer
    x = 216.71

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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.