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Finding the Fourth Proportional to 490.16, 676.71 and 313.22

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Solution

The fourth proportional to 490.16, 676.71 and 313.22 is: 432.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.16 : 676.71 = 313.22 : x
  2. Step 2: Convert to fraction form
    490.16/676.71 = 313.22/x
  3. Step 3: Cross multiply
    490.16x = 676.71 × 313.22
  4. Step 4: Simplify right side
    490.16x = 211,959.11
  5. Step 5: Solve for x
    x = 211,959.11/490.16
  6. Step 6: Final answer
    x = 432.43

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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.