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Finding the Fourth Proportional to 277.41, 415.49 and 261

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Solution

The fourth proportional to 277.41, 415.49 and 261 is: 390.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.41 : 415.49 = 261 : x
  2. Step 2: Convert to fraction form
    277.41/415.49 = 261/x
  3. Step 3: Cross multiply
    277.41x = 415.49 × 261
  4. Step 4: Simplify right side
    277.41x = 108,441.59
  5. Step 5: Solve for x
    x = 108,441.59/277.41
  6. Step 6: Final answer
    x = 390.91

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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.