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Finding the Third Proportional to 5,515,128 and 8,239,320

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Solution

The third proportional to 5,515,128 and 8,239,320 is: 12,309,123.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,515,128 : 8,239,320 = 8,239,320 : x
  2. Step 2: Convert to fraction form
    5,515,128/8,239,320 = 8,239,320/x
  3. Step 3: Cross multiply
    5,515,128x = 8,239,320 × 8,239,320
  4. Step 4: Simplify right side
    5,515,128x = 67,886,394,062,400
  5. Step 5: Solve for x
    x = 67,886,394,062,400/5,515,128
  6. Step 6: Final answer
    x = 12,309,123.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.