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Finding the Fourth Proportional to 450.70, 676.40 and 203.80

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Solution

The fourth proportional to 450.70, 676.40 and 203.80 is: 305.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.70 : 676.40 = 203.80 : x
  2. Step 2: Convert to fraction form
    450.70/676.40 = 203.80/x
  3. Step 3: Cross multiply
    450.70x = 676.40 × 203.80
  4. Step 4: Simplify right side
    450.70x = 137,850.32
  5. Step 5: Solve for x
    x = 137,850.32/450.70
  6. Step 6: Final answer
    x = 305.86

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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.