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Finding the Fourth Proportional to 444.43, 665.03 and 261.91

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Solution

The fourth proportional to 444.43, 665.03 and 261.91 is: 391.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.43 : 665.03 = 261.91 : x
  2. Step 2: Convert to fraction form
    444.43/665.03 = 261.91/x
  3. Step 3: Cross multiply
    444.43x = 665.03 × 261.91
  4. Step 4: Simplify right side
    444.43x = 174,176.70
  5. Step 5: Solve for x
    x = 174,176.70/444.43
  6. Step 6: Final answer
    x = 391.91

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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.