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Finding the Fourth Proportional to 881.36, 1,321.09 and 573.44

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Solution

The fourth proportional to 881.36, 1,321.09 and 573.44 is: 859.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.36 : 1,321.09 = 573.44 : x
  2. Step 2: Convert to fraction form
    881.36/1,321.09 = 573.44/x
  3. Step 3: Cross multiply
    881.36x = 1,321.09 × 573.44
  4. Step 4: Simplify right side
    881.36x = 757,559.24
  5. Step 5: Solve for x
    x = 757,559.24/881.36
  6. Step 6: Final answer
    x = 859.53

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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.