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Finding the Fourth Proportional to 277.24, 415.85 and 84.87

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Solution

The fourth proportional to 277.24, 415.85 and 84.87 is: 127.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.24 : 415.85 = 84.87 : x
  2. Step 2: Convert to fraction form
    277.24/415.85 = 84.87/x
  3. Step 3: Cross multiply
    277.24x = 415.85 × 84.87
  4. Step 4: Simplify right side
    277.24x = 35,290.69
  5. Step 5: Solve for x
    x = 35,290.69/277.24
  6. Step 6: Final answer
    x = 127.29

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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.