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Finding the Fourth Proportional to 217.94, 300.25 and 174.20

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Solution

The fourth proportional to 217.94, 300.25 and 174.20 is: 239.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.94 : 300.25 = 174.20 : x
  2. Step 2: Convert to fraction form
    217.94/300.25 = 174.20/x
  3. Step 3: Cross multiply
    217.94x = 300.25 × 174.20
  4. Step 4: Simplify right side
    217.94x = 52,303.55
  5. Step 5: Solve for x
    x = 52,303.55/217.94
  6. Step 6: Final answer
    x = 239.99

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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.