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Finding the Fourth Proportional to 639.70, 882.94 and 453.22

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Solution

The fourth proportional to 639.70, 882.94 and 453.22 is: 625.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.70 : 882.94 = 453.22 : x
  2. Step 2: Convert to fraction form
    639.70/882.94 = 453.22/x
  3. Step 3: Cross multiply
    639.70x = 882.94 × 453.22
  4. Step 4: Simplify right side
    639.70x = 400,161.65
  5. Step 5: Solve for x
    x = 400,161.65/639.70
  6. Step 6: Final answer
    x = 625.55

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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.