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Finding the Third Proportional to 5,429,918.50 and 7,978,667

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Solution

The third proportional to 5,429,918.50 and 7,978,667 is: 11,723,772.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429,918.50 : 7,978,667 = 7,978,667 : x
  2. Step 2: Convert to fraction form
    5,429,918.50/7,978,667 = 7,978,667/x
  3. Step 3: Cross multiply
    5,429,918.50x = 7,978,667 × 7,978,667
  4. Step 4: Simplify right side
    5,429,918.50x = 63,659,127,096,889
  5. Step 5: Solve for x
    x = 63,659,127,096,889/5,429,918.50
  6. Step 6: Final answer
    x = 11,723,772.11

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.