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Finding the Third Proportional to 1,515 and 2,070

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Solution

The third proportional to 1,515 and 2,070 is: 2,828.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515 : 2,070 = 2,070 : x
  2. Step 2: Convert to fraction form
    1,515/2,070 = 2,070/x
  3. Step 3: Cross multiply
    1,515x = 2,070 × 2,070
  4. Step 4: Simplify right side
    1,515x = 4,284,900
  5. Step 5: Solve for x
    x = 4,284,900/1,515
  6. Step 6: Final answer
    x = 2,828.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.