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Finding the Fourth Proportional to 316.05, 473.26 and 218.85

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Solution

The fourth proportional to 316.05, 473.26 and 218.85 is: 327.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.05 : 473.26 = 218.85 : x
  2. Step 2: Convert to fraction form
    316.05/473.26 = 218.85/x
  3. Step 3: Cross multiply
    316.05x = 473.26 × 218.85
  4. Step 4: Simplify right side
    316.05x = 103,569.49
  5. Step 5: Solve for x
    x = 103,569.49/316.05
  6. Step 6: Final answer
    x = 327.70

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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.