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Finding the Fourth Proportional to 451.24, 676.82 and 207.70

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Solution

The fourth proportional to 451.24, 676.82 and 207.70 is: 311.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.24 : 676.82 = 207.70 : x
  2. Step 2: Convert to fraction form
    451.24/676.82 = 207.70/x
  3. Step 3: Cross multiply
    451.24x = 676.82 × 207.70
  4. Step 4: Simplify right side
    451.24x = 140,574.34
  5. Step 5: Solve for x
    x = 140,574.34/451.24
  6. Step 6: Final answer
    x = 311.53

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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.