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Finding the Fourth Proportional to 779.43, 1,163.52 and 668.55

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Solution

The fourth proportional to 779.43, 1,163.52 and 668.55 is: 998.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.43 : 1,163.52 = 668.55 : x
  2. Step 2: Convert to fraction form
    779.43/1,163.52 = 668.55/x
  3. Step 3: Cross multiply
    779.43x = 1,163.52 × 668.55
  4. Step 4: Simplify right side
    779.43x = 777,871.30
  5. Step 5: Solve for x
    x = 777,871.30/779.43
  6. Step 6: Final answer
    x = 998.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.