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Finding the Fourth Proportional to 277.74, 416.15 and 131.25

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Solution

The fourth proportional to 277.74, 416.15 and 131.25 is: 196.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.74 : 416.15 = 131.25 : x
  2. Step 2: Convert to fraction form
    277.74/416.15 = 131.25/x
  3. Step 3: Cross multiply
    277.74x = 416.15 × 131.25
  4. Step 4: Simplify right side
    277.74x = 54,619.03
  5. Step 5: Solve for x
    x = 54,619.03/277.74
  6. Step 6: Final answer
    x = 196.66

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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.