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Finding the Fourth Proportional to 2,998.70, 4,137.96 and 1,672.72

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Solution

The fourth proportional to 2,998.70, 4,137.96 and 1,672.72 is: 2,308.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,998.70 : 4,137.96 = 1,672.72 : x
  2. Step 2: Convert to fraction form
    2,998.70/4,137.96 = 1,672.72/x
  3. Step 3: Cross multiply
    2,998.70x = 4,137.96 × 1,672.72
  4. Step 4: Simplify right side
    2,998.70x = 6,921,648.45
  5. Step 5: Solve for x
    x = 6,921,648.45/2,998.70
  6. Step 6: Final answer
    x = 2,308.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.