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Finding the Fourth Proportional to 578.19, 868.06 and 319.12

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Solution

The fourth proportional to 578.19, 868.06 and 319.12 is: 479.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.19 : 868.06 = 319.12 : x
  2. Step 2: Convert to fraction form
    578.19/868.06 = 319.12/x
  3. Step 3: Cross multiply
    578.19x = 868.06 × 319.12
  4. Step 4: Simplify right side
    578.19x = 277,015.31
  5. Step 5: Solve for x
    x = 277,015.31/578.19
  6. Step 6: Final answer
    x = 479.11

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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.