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Finding the Third Proportional to 1,390,422.75 and 2,151,789.75

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Solution

The third proportional to 1,390,422.75 and 2,151,789.75 is: 3,330,065.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,422.75 : 2,151,789.75 = 2,151,789.75 : x
  2. Step 2: Convert to fraction form
    1,390,422.75/2,151,789.75 = 2,151,789.75/x
  3. Step 3: Cross multiply
    1,390,422.75x = 2,151,789.75 × 2,151,789.75
  4. Step 4: Simplify right side
    1,390,422.75x = 4,630,199,128,205.06
  5. Step 5: Solve for x
    x = 4,630,199,128,205.06/1,390,422.75
  6. Step 6: Final answer
    x = 3,330,065.71

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.