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Finding the Fourth Proportional to 893.22, 1,339.83 and 541.91

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Solution

The fourth proportional to 893.22, 1,339.83 and 541.91 is: 812.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.22 : 1,339.83 = 541.91 : x
  2. Step 2: Convert to fraction form
    893.22/1,339.83 = 541.91/x
  3. Step 3: Cross multiply
    893.22x = 1,339.83 × 541.91
  4. Step 4: Simplify right side
    893.22x = 726,070.62
  5. Step 5: Solve for x
    x = 726,070.62/893.22
  6. Step 6: Final answer
    x = 812.87

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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.