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Finding the Fourth Proportional to 766.13, 1,057.31 and 579.33

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Solution

The fourth proportional to 766.13, 1,057.31 and 579.33 is: 799.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.13 : 1,057.31 = 579.33 : x
  2. Step 2: Convert to fraction form
    766.13/1,057.31 = 579.33/x
  3. Step 3: Cross multiply
    766.13x = 1,057.31 × 579.33
  4. Step 4: Simplify right side
    766.13x = 612,532.85
  5. Step 5: Solve for x
    x = 612,532.85/766.13
  6. Step 6: Final answer
    x = 799.51

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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.