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Finding the Fourth Proportional to 476.30, 713.30 and 280.73

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Solution

The fourth proportional to 476.30, 713.30 and 280.73 is: 420.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.30 : 713.30 = 280.73 : x
  2. Step 2: Convert to fraction form
    476.30/713.30 = 280.73/x
  3. Step 3: Cross multiply
    476.30x = 713.30 × 280.73
  4. Step 4: Simplify right side
    476.30x = 200,245.09
  5. Step 5: Solve for x
    x = 200,245.09/476.30
  6. Step 6: Final answer
    x = 420.42

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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.