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Finding the Fourth Proportional to 441.99, 663.09 and 386.61

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Solution

The fourth proportional to 441.99, 663.09 and 386.61 is: 580.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.99 : 663.09 = 386.61 : x
  2. Step 2: Convert to fraction form
    441.99/663.09 = 386.61/x
  3. Step 3: Cross multiply
    441.99x = 663.09 × 386.61
  4. Step 4: Simplify right side
    441.99x = 256,357.22
  5. Step 5: Solve for x
    x = 256,357.22/441.99
  6. Step 6: Final answer
    x = 580.01

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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.