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Finding the Third Proportional to 2,815.13 and 4,378.63

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Solution

The third proportional to 2,815.13 and 4,378.63 is: 6,810.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.13 : 4,378.63 = 4,378.63 : x
  2. Step 2: Convert to fraction form
    2,815.13/4,378.63 = 4,378.63/x
  3. Step 3: Cross multiply
    2,815.13x = 4,378.63 × 4,378.63
  4. Step 4: Simplify right side
    2,815.13x = 19,172,356.89
  5. Step 5: Solve for x
    x = 19,172,356.89/2,815.13
  6. Step 6: Final answer
    x = 6,810.48

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.