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Finding the Fourth Proportional to 648.09, 971.50 and 277.99

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Solution

The fourth proportional to 648.09, 971.50 and 277.99 is: 416.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.09 : 971.50 = 277.99 : x
  2. Step 2: Convert to fraction form
    648.09/971.50 = 277.99/x
  3. Step 3: Cross multiply
    648.09x = 971.50 × 277.99
  4. Step 4: Simplify right side
    648.09x = 270,067.98
  5. Step 5: Solve for x
    x = 270,067.98/648.09
  6. Step 6: Final answer
    x = 416.71

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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.