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Finding the Third Proportional to 2,811.50 and 4,202

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Solution

The third proportional to 2,811.50 and 4,202 is: 6,280.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.50 : 4,202 = 4,202 : x
  2. Step 2: Convert to fraction form
    2,811.50/4,202 = 4,202/x
  3. Step 3: Cross multiply
    2,811.50x = 4,202 × 4,202
  4. Step 4: Simplify right side
    2,811.50x = 17,656,804
  5. Step 5: Solve for x
    x = 17,656,804/2,811.50
  6. Step 6: Final answer
    x = 6,280.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.