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Finding the Third Proportional to 477,442 and 646,131

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Solution

The third proportional to 477,442 and 646,131 is: 874,420.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,442 : 646,131 = 646,131 : x
  2. Step 2: Convert to fraction form
    477,442/646,131 = 646,131/x
  3. Step 3: Cross multiply
    477,442x = 646,131 × 646,131
  4. Step 4: Simplify right side
    477,442x = 417,485,269,161
  5. Step 5: Solve for x
    x = 417,485,269,161/477,442
  6. Step 6: Final answer
    x = 874,420.91

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.