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Finding the Fourth Proportional to 490.52, 676.35 and 315.56

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Solution

The fourth proportional to 490.52, 676.35 and 315.56 is: 435.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.52 : 676.35 = 315.56 : x
  2. Step 2: Convert to fraction form
    490.52/676.35 = 315.56/x
  3. Step 3: Cross multiply
    490.52x = 676.35 × 315.56
  4. Step 4: Simplify right side
    490.52x = 213,430.70
  5. Step 5: Solve for x
    x = 213,430.70/490.52
  6. Step 6: Final answer
    x = 435.11

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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.