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Finding the Fourth Proportional to 717.06, 988.55 and 480.60

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Solution

The fourth proportional to 717.06, 988.55 and 480.60 is: 662.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.06 : 988.55 = 480.60 : x
  2. Step 2: Convert to fraction form
    717.06/988.55 = 480.60/x
  3. Step 3: Cross multiply
    717.06x = 988.55 × 480.60
  4. Step 4: Simplify right side
    717.06x = 475,096.53
  5. Step 5: Solve for x
    x = 475,096.53/717.06
  6. Step 6: Final answer
    x = 662.56

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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.