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Finding the Fourth Proportional to 881.61, 1,321.46 and 573.69

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Solution

The fourth proportional to 881.61, 1,321.46 and 573.69 is: 859.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.61 : 1,321.46 = 573.69 : x
  2. Step 2: Convert to fraction form
    881.61/1,321.46 = 573.69/x
  3. Step 3: Cross multiply
    881.61x = 1,321.46 × 573.69
  4. Step 4: Simplify right side
    881.61x = 758,108.39
  5. Step 5: Solve for x
    x = 758,108.39/881.61
  6. Step 6: Final answer
    x = 859.91

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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.