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Finding the Fourth Proportional to 665.72, 999.16 and 482.24

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Solution

The fourth proportional to 665.72, 999.16 and 482.24 is: 723.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.72 : 999.16 = 482.24 : x
  2. Step 2: Convert to fraction form
    665.72/999.16 = 482.24/x
  3. Step 3: Cross multiply
    665.72x = 999.16 × 482.24
  4. Step 4: Simplify right side
    665.72x = 481,834.92
  5. Step 5: Solve for x
    x = 481,834.92/665.72
  6. Step 6: Final answer
    x = 723.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.