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Finding the Fourth Proportional to 317.50, 475.92 and 214.79

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Solution

The fourth proportional to 317.50, 475.92 and 214.79 is: 321.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.50 : 475.92 = 214.79 : x
  2. Step 2: Convert to fraction form
    317.50/475.92 = 214.79/x
  3. Step 3: Cross multiply
    317.50x = 475.92 × 214.79
  4. Step 4: Simplify right side
    317.50x = 102,222.45
  5. Step 5: Solve for x
    x = 102,222.45/317.50
  6. Step 6: Final answer
    x = 321.96

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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.