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Finding the Third Proportional to 1,390,878 and 2,931,198.75

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Solution

The third proportional to 1,390,878 and 2,931,198.75 is: 6,177,339.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,878 : 2,931,198.75 = 2,931,198.75 : x
  2. Step 2: Convert to fraction form
    1,390,878/2,931,198.75 = 2,931,198.75/x
  3. Step 3: Cross multiply
    1,390,878x = 2,931,198.75 × 2,931,198.75
  4. Step 4: Simplify right side
    1,390,878x = 8,591,926,112,001.56
  5. Step 5: Solve for x
    x = 8,591,926,112,001.56/1,390,878
  6. Step 6: Final answer
    x = 6,177,339.86

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.