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Finding the Fourth Proportional to 476.80, 713.78 and 270.72

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Solution

The fourth proportional to 476.80, 713.78 and 270.72 is: 405.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.80 : 713.78 = 270.72 : x
  2. Step 2: Convert to fraction form
    476.80/713.78 = 270.72/x
  3. Step 3: Cross multiply
    476.80x = 713.78 × 270.72
  4. Step 4: Simplify right side
    476.80x = 193,234.18
  5. Step 5: Solve for x
    x = 193,234.18/476.80
  6. Step 6: Final answer
    x = 405.28

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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.