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Finding the Third Proportional to 905,421 and 1,918,791

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Solution

The third proportional to 905,421 and 1,918,791 is: 4,066,350.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,421 : 1,918,791 = 1,918,791 : x
  2. Step 2: Convert to fraction form
    905,421/1,918,791 = 1,918,791/x
  3. Step 3: Cross multiply
    905,421x = 1,918,791 × 1,918,791
  4. Step 4: Simplify right side
    905,421x = 3,681,758,901,681
  5. Step 5: Solve for x
    x = 3,681,758,901,681/905,421
  6. Step 6: Final answer
    x = 4,066,350.24

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.