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Finding the Fourth Proportional to 609.84, 914.48 and 219.76

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Solution

The fourth proportional to 609.84, 914.48 and 219.76 is: 329.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.84 : 914.48 = 219.76 : x
  2. Step 2: Convert to fraction form
    609.84/914.48 = 219.76/x
  3. Step 3: Cross multiply
    609.84x = 914.48 × 219.76
  4. Step 4: Simplify right side
    609.84x = 200,966.12
  5. Step 5: Solve for x
    x = 200,966.12/609.84
  6. Step 6: Final answer
    x = 329.54

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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.