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Finding the Fourth Proportional to 277.28, 381.78 and 235.74

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Solution

The fourth proportional to 277.28, 381.78 and 235.74 is: 324.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.28 : 381.78 = 235.74 : x
  2. Step 2: Convert to fraction form
    277.28/381.78 = 235.74/x
  3. Step 3: Cross multiply
    277.28x = 381.78 × 235.74
  4. Step 4: Simplify right side
    277.28x = 90,000.82
  5. Step 5: Solve for x
    x = 90,000.82/277.28
  6. Step 6: Final answer
    x = 324.58

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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.