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Finding the Fourth Proportional to 716.96, 988.87 and 481.18

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Solution

The fourth proportional to 716.96, 988.87 and 481.18 is: 663.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.96 : 988.87 = 481.18 : x
  2. Step 2: Convert to fraction form
    716.96/988.87 = 481.18/x
  3. Step 3: Cross multiply
    716.96x = 988.87 × 481.18
  4. Step 4: Simplify right side
    716.96x = 475,817.12
  5. Step 5: Solve for x
    x = 475,817.12/716.96
  6. Step 6: Final answer
    x = 663.66

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Double scale
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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.