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Finding the Fourth Proportional to 474.11, 711.17 and 311.75

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Solution

The fourth proportional to 474.11, 711.17 and 311.75 is: 467.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.11 : 711.17 = 311.75 : x
  2. Step 2: Convert to fraction form
    474.11/711.17 = 311.75/x
  3. Step 3: Cross multiply
    474.11x = 711.17 × 311.75
  4. Step 4: Simplify right side
    474.11x = 221,707.25
  5. Step 5: Solve for x
    x = 221,707.25/474.11
  6. Step 6: Final answer
    x = 467.63

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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.