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Finding the Fourth Proportional to 479.28, 719.08 and 190.56

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Solution

The fourth proportional to 479.28, 719.08 and 190.56 is: 285.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.28 : 719.08 = 190.56 : x
  2. Step 2: Convert to fraction form
    479.28/719.08 = 190.56/x
  3. Step 3: Cross multiply
    479.28x = 719.08 × 190.56
  4. Step 4: Simplify right side
    479.28x = 137,027.88
  5. Step 5: Solve for x
    x = 137,027.88/479.28
  6. Step 6: Final answer
    x = 285.90

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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.