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Finding the Fourth Proportional to 439.68, 660.33 and 395.12

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Solution

The fourth proportional to 439.68, 660.33 and 395.12 is: 593.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.68 : 660.33 = 395.12 : x
  2. Step 2: Convert to fraction form
    439.68/660.33 = 395.12/x
  3. Step 3: Cross multiply
    439.68x = 660.33 × 395.12
  4. Step 4: Simplify right side
    439.68x = 260,906.29
  5. Step 5: Solve for x
    x = 260,906.29/439.68
  6. Step 6: Final answer
    x = 593.40

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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.