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Finding the Third Proportional to 1,987,478.75 and 4,289,703.25

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Solution

The third proportional to 1,987,478.75 and 4,289,703.25 is: 9,258,742.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,478.75 : 4,289,703.25 = 4,289,703.25 : x
  2. Step 2: Convert to fraction form
    1,987,478.75/4,289,703.25 = 4,289,703.25/x
  3. Step 3: Cross multiply
    1,987,478.75x = 4,289,703.25 × 4,289,703.25
  4. Step 4: Simplify right side
    1,987,478.75x = 18,401,553,973,060.56
  5. Step 5: Solve for x
    x = 18,401,553,973,060.56/1,987,478.75
  6. Step 6: Final answer
    x = 9,258,742.50

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.