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Finding the Fourth Proportional to 893.22, 1,231.11 and 725.46

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Solution

The fourth proportional to 893.22, 1,231.11 and 725.46 is: 999.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.22 : 1,231.11 = 725.46 : x
  2. Step 2: Convert to fraction form
    893.22/1,231.11 = 725.46/x
  3. Step 3: Cross multiply
    893.22x = 1,231.11 × 725.46
  4. Step 4: Simplify right side
    893.22x = 893,121.06
  5. Step 5: Solve for x
    x = 893,121.06/893.22
  6. Step 6: Final answer
    x = 999.89

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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.