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Finding the Fourth Proportional to 441.87, 661.64 and 389.97

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Solution

The fourth proportional to 441.87, 661.64 and 389.97 is: 583.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.87 : 661.64 = 389.97 : x
  2. Step 2: Convert to fraction form
    441.87/661.64 = 389.97/x
  3. Step 3: Cross multiply
    441.87x = 661.64 × 389.97
  4. Step 4: Simplify right side
    441.87x = 258,017.80
  5. Step 5: Solve for x
    x = 258,017.80/441.87
  6. Step 6: Final answer
    x = 583.92

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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.