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Finding the Fourth Proportional to 277.40, 415.88 and 131.24

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Solution

The fourth proportional to 277.40, 415.88 and 131.24 is: 196.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.40 : 415.88 = 131.24 : x
  2. Step 2: Convert to fraction form
    277.40/415.88 = 131.24/x
  3. Step 3: Cross multiply
    277.40x = 415.88 × 131.24
  4. Step 4: Simplify right side
    277.40x = 54,580.09
  5. Step 5: Solve for x
    x = 54,580.09/277.40
  6. Step 6: Final answer
    x = 196.76

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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.