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Finding the Fourth Proportional to 479.62, 719.78 and 191.14

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Solution

The fourth proportional to 479.62, 719.78 and 191.14 is: 286.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.62 : 719.78 = 191.14 : x
  2. Step 2: Convert to fraction form
    479.62/719.78 = 191.14/x
  3. Step 3: Cross multiply
    479.62x = 719.78 × 191.14
  4. Step 4: Simplify right side
    479.62x = 137,578.75
  5. Step 5: Solve for x
    x = 137,578.75/479.62
  6. Step 6: Final answer
    x = 286.85

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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.