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Finding the Fourth Proportional to 609.57, 914.81 and 378.79

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Solution

The fourth proportional to 609.57, 914.81 and 378.79 is: 568.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.57 : 914.81 = 378.79 : x
  2. Step 2: Convert to fraction form
    609.57/914.81 = 378.79/x
  3. Step 3: Cross multiply
    609.57x = 914.81 × 378.79
  4. Step 4: Simplify right side
    609.57x = 346,521.84
  5. Step 5: Solve for x
    x = 346,521.84/609.57
  6. Step 6: Final answer
    x = 568.47

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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.