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Finding the Third Proportional to 1,909,120 and 4,117,120

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Solution

The third proportional to 1,909,120 and 4,117,120 is: 8,878,790.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909,120 : 4,117,120 = 4,117,120 : x
  2. Step 2: Convert to fraction form
    1,909,120/4,117,120 = 4,117,120/x
  3. Step 3: Cross multiply
    1,909,120x = 4,117,120 × 4,117,120
  4. Step 4: Simplify right side
    1,909,120x = 16,950,677,094,400
  5. Step 5: Solve for x
    x = 16,950,677,094,400/1,909,120
  6. Step 6: Final answer
    x = 8,878,790.80

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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.