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Finding the Fourth Proportional to 410.05, 613.99 and 217.09

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Solution

The fourth proportional to 410.05, 613.99 and 217.09 is: 325.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.05 : 613.99 = 217.09 : x
  2. Step 2: Convert to fraction form
    410.05/613.99 = 217.09/x
  3. Step 3: Cross multiply
    410.05x = 613.99 × 217.09
  4. Step 4: Simplify right side
    410.05x = 133,291.09
  5. Step 5: Solve for x
    x = 133,291.09/410.05
  6. Step 6: Final answer
    x = 325.06

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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.