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Finding the Fourth Proportional to 314.35, 471.53 and 217.15

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Solution

The fourth proportional to 314.35, 471.53 and 217.15 is: 325.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.35 : 471.53 = 217.15 : x
  2. Step 2: Convert to fraction form
    314.35/471.53 = 217.15/x
  3. Step 3: Cross multiply
    314.35x = 471.53 × 217.15
  4. Step 4: Simplify right side
    314.35x = 102,391.65
  5. Step 5: Solve for x
    x = 102,391.65/314.35
  6. Step 6: Final answer
    x = 325.73

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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.