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Finding the Fourth Proportional to 490.05, 672.30 and 453.60

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Solution

The fourth proportional to 490.05, 672.30 and 453.60 is: 622.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.05 : 672.30 = 453.60 : x
  2. Step 2: Convert to fraction form
    490.05/672.30 = 453.60/x
  3. Step 3: Cross multiply
    490.05x = 672.30 × 453.60
  4. Step 4: Simplify right side
    490.05x = 304,955.28
  5. Step 5: Solve for x
    x = 304,955.28/490.05
  6. Step 6: Final answer
    x = 622.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.