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Finding the Fourth Proportional to 441.21, 659.37 and 386.55

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Solution

The fourth proportional to 441.21, 659.37 and 386.55 is: 577.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.21 : 659.37 = 386.55 : x
  2. Step 2: Convert to fraction form
    441.21/659.37 = 386.55/x
  3. Step 3: Cross multiply
    441.21x = 659.37 × 386.55
  4. Step 4: Simplify right side
    441.21x = 254,879.47
  5. Step 5: Solve for x
    x = 254,879.47/441.21
  6. Step 6: Final answer
    x = 577.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.