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Finding the Fourth Proportional to 217.87, 325.25 and 210.28

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Solution

The fourth proportional to 217.87, 325.25 and 210.28 is: 313.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.87 : 325.25 = 210.28 : x
  2. Step 2: Convert to fraction form
    217.87/325.25 = 210.28/x
  3. Step 3: Cross multiply
    217.87x = 325.25 × 210.28
  4. Step 4: Simplify right side
    217.87x = 68,392.49
  5. Step 5: Solve for x
    x = 68,392.49/217.87
  6. Step 6: Final answer
    x = 313.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.