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Finding the Third Proportional to 390,120 and 843,054

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Solution

The third proportional to 390,120 and 843,054 is: 1,821,849.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,120 : 843,054 = 843,054 : x
  2. Step 2: Convert to fraction form
    390,120/843,054 = 843,054/x
  3. Step 3: Cross multiply
    390,120x = 843,054 × 843,054
  4. Step 4: Simplify right side
    390,120x = 710,740,046,916
  5. Step 5: Solve for x
    x = 710,740,046,916/390,120
  6. Step 6: Final answer
    x = 1,821,849.81

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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.