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Finding the Fourth Proportional to 277.26, 415.23 and 139.87

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Solution

The fourth proportional to 277.26, 415.23 and 139.87 is: 209.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.26 : 415.23 = 139.87 : x
  2. Step 2: Convert to fraction form
    277.26/415.23 = 139.87/x
  3. Step 3: Cross multiply
    277.26x = 415.23 × 139.87
  4. Step 4: Simplify right side
    277.26x = 58,078.22
  5. Step 5: Solve for x
    x = 58,078.22/277.26
  6. Step 6: Final answer
    x = 209.47

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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.