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Finding the Fourth Proportional to 451.41, 676.88 and 207.72

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Solution

The fourth proportional to 451.41, 676.88 and 207.72 is: 311.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.41 : 676.88 = 207.72 : x
  2. Step 2: Convert to fraction form
    451.41/676.88 = 207.72/x
  3. Step 3: Cross multiply
    451.41x = 676.88 × 207.72
  4. Step 4: Simplify right side
    451.41x = 140,600.48
  5. Step 5: Solve for x
    x = 140,600.48/451.41
  6. Step 6: Final answer
    x = 311.47

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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.