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Finding the Fourth Proportional to 662.28, 991.64 and 579.26

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Solution

The fourth proportional to 662.28, 991.64 and 579.26 is: 867.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.28 : 991.64 = 579.26 : x
  2. Step 2: Convert to fraction form
    662.28/991.64 = 579.26/x
  3. Step 3: Cross multiply
    662.28x = 991.64 × 579.26
  4. Step 4: Simplify right side
    662.28x = 574,417.39
  5. Step 5: Solve for x
    x = 574,417.39/662.28
  6. Step 6: Final answer
    x = 867.33

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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.