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Finding the Fourth Proportional to 550.44, 755.55 and 486.87

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Solution

The fourth proportional to 550.44, 755.55 and 486.87 is: 668.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.44 : 755.55 = 486.87 : x
  2. Step 2: Convert to fraction form
    550.44/755.55 = 486.87/x
  3. Step 3: Cross multiply
    550.44x = 755.55 × 486.87
  4. Step 4: Simplify right side
    550.44x = 367,854.63
  5. Step 5: Solve for x
    x = 367,854.63/550.44
  6. Step 6: Final answer
    x = 668.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.