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Finding the Fourth Proportional to 550.09, 757.25 and 487.82

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Solution

The fourth proportional to 550.09, 757.25 and 487.82 is: 671.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.09 : 757.25 = 487.82 : x
  2. Step 2: Convert to fraction form
    550.09/757.25 = 487.82/x
  3. Step 3: Cross multiply
    550.09x = 757.25 × 487.82
  4. Step 4: Simplify right side
    550.09x = 369,402.98
  5. Step 5: Solve for x
    x = 369,402.98/550.09
  6. Step 6: Final answer
    x = 671.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.