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Finding the Fourth Proportional to 779, 1,075.06 and 447.48

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Solution

The fourth proportional to 779, 1,075.06 and 447.48 is: 617.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    779 : 1,075.06 = 447.48 : x
  2. Step 2: Convert to fraction form
    779/1,075.06 = 447.48/x
  3. Step 3: Cross multiply
    779x = 1,075.06 × 447.48
  4. Step 4: Simplify right side
    779x = 481,067.85
  5. Step 5: Solve for x
    x = 481,067.85/779
  6. Step 6: Final answer
    x = 617.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.