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Finding the Fourth Proportional to 374.72, 517.18 and 217.33

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Solution

The fourth proportional to 374.72, 517.18 and 217.33 is: 299.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.72 : 517.18 = 217.33 : x
  2. Step 2: Convert to fraction form
    374.72/517.18 = 217.33/x
  3. Step 3: Cross multiply
    374.72x = 517.18 × 217.33
  4. Step 4: Simplify right side
    374.72x = 112,396.89
  5. Step 5: Solve for x
    x = 112,396.89/374.72
  6. Step 6: Final answer
    x = 299.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.