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Finding the Fourth Proportional to 490.88, 677.42 and 366.65

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Solution

The fourth proportional to 490.88, 677.42 and 366.65 is: 505.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.88 : 677.42 = 366.65 : x
  2. Step 2: Convert to fraction form
    490.88/677.42 = 366.65/x
  3. Step 3: Cross multiply
    490.88x = 677.42 × 366.65
  4. Step 4: Simplify right side
    490.88x = 248,370.82
  5. Step 5: Solve for x
    x = 248,370.82/490.88
  6. Step 6: Final answer
    x = 505.98

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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.