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Finding the Fourth Proportional to 298.28, 411.70 and 273.70

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Solution

The fourth proportional to 298.28, 411.70 and 273.70 is: 377.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.28 : 411.70 = 273.70 : x
  2. Step 2: Convert to fraction form
    298.28/411.70 = 273.70/x
  3. Step 3: Cross multiply
    298.28x = 411.70 × 273.70
  4. Step 4: Simplify right side
    298.28x = 112,682.29
  5. Step 5: Solve for x
    x = 112,682.29/298.28
  6. Step 6: Final answer
    x = 377.77

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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.