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Finding the Fourth Proportional to 717.15, 989.37 and 481.17

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Solution

The fourth proportional to 717.15, 989.37 and 481.17 is: 663.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.15 : 989.37 = 481.17 : x
  2. Step 2: Convert to fraction form
    717.15/989.37 = 481.17/x
  3. Step 3: Cross multiply
    717.15x = 989.37 × 481.17
  4. Step 4: Simplify right side
    717.15x = 476,055.16
  5. Step 5: Solve for x
    x = 476,055.16/717.15
  6. Step 6: Final answer
    x = 663.82

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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.