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Finding the Third Proportional to 390,160 and 838,520

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Solution

The third proportional to 390,160 and 838,520 is: 1,802,121.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,160 : 838,520 = 838,520 : x
  2. Step 2: Convert to fraction form
    390,160/838,520 = 838,520/x
  3. Step 3: Cross multiply
    390,160x = 838,520 × 838,520
  4. Step 4: Simplify right side
    390,160x = 703,115,790,400
  5. Step 5: Solve for x
    x = 703,115,790,400/390,160
  6. Step 6: Final answer
    x = 1,802,121.67

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.