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Finding the Fourth Proportional to 779.44, 1,075.66 and 447.97

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Solution

The fourth proportional to 779.44, 1,075.66 and 447.97 is: 618.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.44 : 1,075.66 = 447.97 : x
  2. Step 2: Convert to fraction form
    779.44/1,075.66 = 447.97/x
  3. Step 3: Cross multiply
    779.44x = 1,075.66 × 447.97
  4. Step 4: Simplify right side
    779.44x = 481,858.48
  5. Step 5: Solve for x
    x = 481,858.48/779.44
  6. Step 6: Final answer
    x = 618.21

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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.