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Finding the Fourth Proportional to 475.75, 713.67 and 311.32

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Solution

The fourth proportional to 475.75, 713.67 and 311.32 is: 467.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.75 : 713.67 = 311.32 : x
  2. Step 2: Convert to fraction form
    475.75/713.67 = 311.32/x
  3. Step 3: Cross multiply
    475.75x = 713.67 × 311.32
  4. Step 4: Simplify right side
    475.75x = 222,179.74
  5. Step 5: Solve for x
    x = 222,179.74/475.75
  6. Step 6: Final answer
    x = 467.01

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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.