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Finding the Fourth Proportional to 717.46, 990.27 and 482.07

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Solution

The fourth proportional to 717.46, 990.27 and 482.07 is: 665.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.46 : 990.27 = 482.07 : x
  2. Step 2: Convert to fraction form
    717.46/990.27 = 482.07/x
  3. Step 3: Cross multiply
    717.46x = 990.27 × 482.07
  4. Step 4: Simplify right side
    717.46x = 477,378.25
  5. Step 5: Solve for x
    x = 477,378.25/717.46
  6. Step 6: Final answer
    x = 665.37

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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.