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Finding the Fourth Proportional to 479.58, 719.49 and 190.92

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Solution

The fourth proportional to 479.58, 719.49 and 190.92 is: 286.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.58 : 719.49 = 190.92 : x
  2. Step 2: Convert to fraction form
    479.58/719.49 = 190.92/x
  3. Step 3: Cross multiply
    479.58x = 719.49 × 190.92
  4. Step 4: Simplify right side
    479.58x = 137,365.03
  5. Step 5: Solve for x
    x = 137,365.03/479.58
  6. Step 6: Final answer
    x = 286.43

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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.