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Finding the Fourth Proportional to 640.18, 882.43 and 453.27

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Solution

The fourth proportional to 640.18, 882.43 and 453.27 is: 624.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.18 : 882.43 = 453.27 : x
  2. Step 2: Convert to fraction form
    640.18/882.43 = 453.27/x
  3. Step 3: Cross multiply
    640.18x = 882.43 × 453.27
  4. Step 4: Simplify right side
    640.18x = 399,979.05
  5. Step 5: Solve for x
    x = 399,979.05/640.18
  6. Step 6: Final answer
    x = 624.79

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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.