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Finding the Fourth Proportional to 671.01, 1,006.37 and 208.63

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Solution

The fourth proportional to 671.01, 1,006.37 and 208.63 is: 312.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.01 : 1,006.37 = 208.63 : x
  2. Step 2: Convert to fraction form
    671.01/1,006.37 = 208.63/x
  3. Step 3: Cross multiply
    671.01x = 1,006.37 × 208.63
  4. Step 4: Simplify right side
    671.01x = 209,958.97
  5. Step 5: Solve for x
    x = 209,958.97/671.01
  6. Step 6: Final answer
    x = 312.90

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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.