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Finding the Fourth Proportional to 490.92, 677.33 and 316.37

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Solution

The fourth proportional to 490.92, 677.33 and 316.37 is: 436.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.92 : 677.33 = 316.37 : x
  2. Step 2: Convert to fraction form
    490.92/677.33 = 316.37/x
  3. Step 3: Cross multiply
    490.92x = 677.33 × 316.37
  4. Step 4: Simplify right side
    490.92x = 214,283.51
  5. Step 5: Solve for x
    x = 214,283.51/490.92
  6. Step 6: Final answer
    x = 436.49

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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.