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Finding the Fourth Proportional to 490.88, 677.41 and 316.23

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Solution

The fourth proportional to 490.88, 677.41 and 316.23 is: 436.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.88 : 677.41 = 316.23 : x
  2. Step 2: Convert to fraction form
    490.88/677.41 = 316.23/x
  3. Step 3: Cross multiply
    490.88x = 677.41 × 316.23
  4. Step 4: Simplify right side
    490.88x = 214,213.98
  5. Step 5: Solve for x
    x = 214,213.98/490.88
  6. Step 6: Final answer
    x = 436.39

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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.