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Finding the Fourth Proportional to 441.89, 660.89 and 393.47

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Solution

The fourth proportional to 441.89, 660.89 and 393.47 is: 588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.89 : 660.89 = 393.47 : x
  2. Step 2: Convert to fraction form
    441.89/660.89 = 393.47/x
  3. Step 3: Cross multiply
    441.89x = 660.89 × 393.47
  4. Step 4: Simplify right side
    441.89x = 260,040.07
  5. Step 5: Solve for x
    x = 260,040.07/441.89
  6. Step 6: Final answer
    x = 588.48

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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.