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Finding the Fourth Proportional to 271.48, 407.19 and 217.70

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Solution

The fourth proportional to 271.48, 407.19 and 217.70 is: 326.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.48 : 407.19 = 217.70 : x
  2. Step 2: Convert to fraction form
    271.48/407.19 = 217.70/x
  3. Step 3: Cross multiply
    271.48x = 407.19 × 217.70
  4. Step 4: Simplify right side
    271.48x = 88,645.26
  5. Step 5: Solve for x
    x = 88,645.26/271.48
  6. Step 6: Final answer
    x = 326.53

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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.