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Finding the Fourth Proportional to 217.02, 322.89 and 211.44

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Solution

The fourth proportional to 217.02, 322.89 and 211.44 is: 314.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.02 : 322.89 = 211.44 : x
  2. Step 2: Convert to fraction form
    217.02/322.89 = 211.44/x
  3. Step 3: Cross multiply
    217.02x = 322.89 × 211.44
  4. Step 4: Simplify right side
    217.02x = 68,271.86
  5. Step 5: Solve for x
    x = 68,271.86/217.02
  6. Step 6: Final answer
    x = 314.59

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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.