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Finding the Fourth Proportional to 490.17, 676.31 and 358.95

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Solution

The fourth proportional to 490.17, 676.31 and 358.95 is: 495.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.17 : 676.31 = 358.95 : x
  2. Step 2: Convert to fraction form
    490.17/676.31 = 358.95/x
  3. Step 3: Cross multiply
    490.17x = 676.31 × 358.95
  4. Step 4: Simplify right side
    490.17x = 242,756.30
  5. Step 5: Solve for x
    x = 242,756.30/490.17
  6. Step 6: Final answer
    x = 495.25

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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.