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Finding the Fourth Proportional to 277.89, 416.70 and 123.81

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Solution

The fourth proportional to 277.89, 416.70 and 123.81 is: 185.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.89 : 416.70 = 123.81 : x
  2. Step 2: Convert to fraction form
    277.89/416.70 = 123.81/x
  3. Step 3: Cross multiply
    277.89x = 416.70 × 123.81
  4. Step 4: Simplify right side
    277.89x = 51,591.63
  5. Step 5: Solve for x
    x = 51,591.63/277.89
  6. Step 6: Final answer
    x = 185.65

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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.