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Finding the Fourth Proportional to 451.62, 677.43 and 208.43

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Solution

The fourth proportional to 451.62, 677.43 and 208.43 is: 312.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.62 : 677.43 = 208.43 : x
  2. Step 2: Convert to fraction form
    451.62/677.43 = 208.43/x
  3. Step 3: Cross multiply
    451.62x = 677.43 × 208.43
  4. Step 4: Simplify right side
    451.62x = 141,193.35
  5. Step 5: Solve for x
    x = 141,193.35/451.62
  6. Step 6: Final answer
    x = 312.64

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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.