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Finding the Fourth Proportional to 470.28, 649 and 273.80

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Solution

The fourth proportional to 470.28, 649 and 273.80 is: 377.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.28 : 649 = 273.80 : x
  2. Step 2: Convert to fraction form
    470.28/649 = 273.80/x
  3. Step 3: Cross multiply
    470.28x = 649 × 273.80
  4. Step 4: Simplify right side
    470.28x = 177,696.20
  5. Step 5: Solve for x
    x = 177,696.20/470.28
  6. Step 6: Final answer
    x = 377.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.