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Finding the Third Proportional to 2,153 and 2,811.50

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Solution

The third proportional to 2,153 and 2,811.50 is: 3,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153 : 2,811.50 = 2,811.50 : x
  2. Step 2: Convert to fraction form
    2,153/2,811.50 = 2,811.50/x
  3. Step 3: Cross multiply
    2,153x = 2,811.50 × 2,811.50
  4. Step 4: Simplify right side
    2,153x = 7,904,532.25
  5. Step 5: Solve for x
    x = 7,904,532.25/2,153
  6. Step 6: Final answer
    x = 3,671.40

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.