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Finding the Fourth Proportional to 578.91, 868.38 and 146.07

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Solution

The fourth proportional to 578.91, 868.38 and 146.07 is: 219.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.91 : 868.38 = 146.07 : x
  2. Step 2: Convert to fraction form
    578.91/868.38 = 146.07/x
  3. Step 3: Cross multiply
    578.91x = 868.38 × 146.07
  4. Step 4: Simplify right side
    578.91x = 126,844.27
  5. Step 5: Solve for x
    x = 126,844.27/578.91
  6. Step 6: Final answer
    x = 219.11

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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.