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Finding the Fourth Proportional to 453.22, 676.75 and 427.55

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Solution

The fourth proportional to 453.22, 676.75 and 427.55 is: 638.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.22 : 676.75 = 427.55 : x
  2. Step 2: Convert to fraction form
    453.22/676.75 = 427.55/x
  3. Step 3: Cross multiply
    453.22x = 676.75 × 427.55
  4. Step 4: Simplify right side
    453.22x = 289,347.96
  5. Step 5: Solve for x
    x = 289,347.96/453.22
  6. Step 6: Final answer
    x = 638.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.