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Finding the Third Proportional to 393,034 and 842,138

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Solution

The third proportional to 393,034 and 842,138 is: 1,804,414.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,034 : 842,138 = 842,138 : x
  2. Step 2: Convert to fraction form
    393,034/842,138 = 842,138/x
  3. Step 3: Cross multiply
    393,034x = 842,138 × 842,138
  4. Step 4: Simplify right side
    393,034x = 709,196,411,044
  5. Step 5: Solve for x
    x = 709,196,411,044/393,034
  6. Step 6: Final answer
    x = 1,804,414.91

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.