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Finding the Fourth Proportional to 453.52, 680.97 and 431.22

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Solution

The fourth proportional to 453.52, 680.97 and 431.22 is: 647.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.52 : 680.97 = 431.22 : x
  2. Step 2: Convert to fraction form
    453.52/680.97 = 431.22/x
  3. Step 3: Cross multiply
    453.52x = 680.97 × 431.22
  4. Step 4: Simplify right side
    453.52x = 293,646.50
  5. Step 5: Solve for x
    x = 293,646.50/453.52
  6. Step 6: Final answer
    x = 647.49

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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.