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Finding the Fourth Proportional to 716.96, 989.62 and 481.32

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Solution

The fourth proportional to 716.96, 989.62 and 481.32 is: 664.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.96 : 989.62 = 481.32 : x
  2. Step 2: Convert to fraction form
    716.96/989.62 = 481.32/x
  3. Step 3: Cross multiply
    716.96x = 989.62 × 481.32
  4. Step 4: Simplify right side
    716.96x = 476,323.90
  5. Step 5: Solve for x
    x = 476,323.90/716.96
  6. Step 6: Final answer
    x = 664.37

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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.