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Finding the Fourth Proportional to 214.24, 320.97 and 105.79

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Solution

The fourth proportional to 214.24, 320.97 and 105.79 is: 158.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.24 : 320.97 = 105.79 : x
  2. Step 2: Convert to fraction form
    214.24/320.97 = 105.79/x
  3. Step 3: Cross multiply
    214.24x = 320.97 × 105.79
  4. Step 4: Simplify right side
    214.24x = 33,955.42
  5. Step 5: Solve for x
    x = 33,955.42/214.24
  6. Step 6: Final answer
    x = 158.49

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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.