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Finding the Third Proportional to 2,131 and 3,390.50

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Solution

The third proportional to 2,131 and 3,390.50 is: 5,394.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131 : 3,390.50 = 3,390.50 : x
  2. Step 2: Convert to fraction form
    2,131/3,390.50 = 3,390.50/x
  3. Step 3: Cross multiply
    2,131x = 3,390.50 × 3,390.50
  4. Step 4: Simplify right side
    2,131x = 11,495,490.25
  5. Step 5: Solve for x
    x = 11,495,490.25/2,131
  6. Step 6: Final answer
    x = 5,394.41

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.