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Finding the Fourth Proportional to 316.94, 475.82 and 214.68

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Solution

The fourth proportional to 316.94, 475.82 and 214.68 is: 322.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.94 : 475.82 = 214.68 : x
  2. Step 2: Convert to fraction form
    316.94/475.82 = 214.68/x
  3. Step 3: Cross multiply
    316.94x = 475.82 × 214.68
  4. Step 4: Simplify right side
    316.94x = 102,149.04
  5. Step 5: Solve for x
    x = 102,149.04/316.94
  6. Step 6: Final answer
    x = 322.30

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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.