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Finding the Third Proportional to 917,910 and 1,988,360

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Solution

The third proportional to 917,910 and 1,988,360 is: 4,307,149.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,910 : 1,988,360 = 1,988,360 : x
  2. Step 2: Convert to fraction form
    917,910/1,988,360 = 1,988,360/x
  3. Step 3: Cross multiply
    917,910x = 1,988,360 × 1,988,360
  4. Step 4: Simplify right side
    917,910x = 3,953,575,489,600
  5. Step 5: Solve for x
    x = 3,953,575,489,600/917,910
  6. Step 6: Final answer
    x = 4,307,149.38

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.