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Finding the Fourth Proportional to 217.54, 300.27 and 210.70

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Solution

The fourth proportional to 217.54, 300.27 and 210.70 is: 290.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.54 : 300.27 = 210.70 : x
  2. Step 2: Convert to fraction form
    217.54/300.27 = 210.70/x
  3. Step 3: Cross multiply
    217.54x = 300.27 × 210.70
  4. Step 4: Simplify right side
    217.54x = 63,266.89
  5. Step 5: Solve for x
    x = 63,266.89/217.54
  6. Step 6: Final answer
    x = 290.83

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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.