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Finding the Fourth Proportional to 214.62, 322.08 and 137.64

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Solution

The fourth proportional to 214.62, 322.08 and 137.64 is: 206.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.62 : 322.08 = 137.64 : x
  2. Step 2: Convert to fraction form
    214.62/322.08 = 137.64/x
  3. Step 3: Cross multiply
    214.62x = 322.08 × 137.64
  4. Step 4: Simplify right side
    214.62x = 44,331.09
  5. Step 5: Solve for x
    x = 44,331.09/214.62
  6. Step 6: Final answer
    x = 206.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.