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Finding the Fourth Proportional to 893.22, 1,232.79 and 520.42

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Solution

The fourth proportional to 893.22, 1,232.79 and 520.42 is: 718.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.22 : 1,232.79 = 520.42 : x
  2. Step 2: Convert to fraction form
    893.22/1,232.79 = 520.42/x
  3. Step 3: Cross multiply
    893.22x = 1,232.79 × 520.42
  4. Step 4: Simplify right side
    893.22x = 641,567.68
  5. Step 5: Solve for x
    x = 641,567.68/893.22
  6. Step 6: Final answer
    x = 718.26

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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.