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Finding the Fourth Proportional to 453.36, 621.88 and 449.47

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Solution

The fourth proportional to 453.36, 621.88 and 449.47 is: 616.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.36 : 621.88 = 449.47 : x
  2. Step 2: Convert to fraction form
    453.36/621.88 = 449.47/x
  3. Step 3: Cross multiply
    453.36x = 621.88 × 449.47
  4. Step 4: Simplify right side
    453.36x = 279,511.05
  5. Step 5: Solve for x
    x = 279,511.05/453.36
  6. Step 6: Final answer
    x = 616.53

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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.