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Finding the Fourth Proportional to 893.31, 1,338.87 and 633.39

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Solution

The fourth proportional to 893.31, 1,338.87 and 633.39 is: 949.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.31 : 1,338.87 = 633.39 : x
  2. Step 2: Convert to fraction form
    893.31/1,338.87 = 633.39/x
  3. Step 3: Cross multiply
    893.31x = 1,338.87 × 633.39
  4. Step 4: Simplify right side
    893.31x = 848,026.87
  5. Step 5: Solve for x
    x = 848,026.87/893.31
  6. Step 6: Final answer
    x = 949.31

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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.