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Finding the Fourth Proportional to 453.29, 680.09 and 209.63

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Solution

The fourth proportional to 453.29, 680.09 and 209.63 is: 314.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.29 : 680.09 = 209.63 : x
  2. Step 2: Convert to fraction form
    453.29/680.09 = 209.63/x
  3. Step 3: Cross multiply
    453.29x = 680.09 × 209.63
  4. Step 4: Simplify right side
    453.29x = 142,562.82
  5. Step 5: Solve for x
    x = 142,562.82/453.29
  6. Step 6: Final answer
    x = 314.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.