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Finding the Fourth Proportional to 490.77, 676.13 and 366.21

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Solution

The fourth proportional to 490.77, 676.13 and 366.21 is: 504.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.77 : 676.13 = 366.21 : x
  2. Step 2: Convert to fraction form
    490.77/676.13 = 366.21/x
  3. Step 3: Cross multiply
    490.77x = 676.13 × 366.21
  4. Step 4: Simplify right side
    490.77x = 247,603.74
  5. Step 5: Solve for x
    x = 247,603.74/490.77
  6. Step 6: Final answer
    x = 504.52

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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.