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Finding the Third Proportional to 380,388 and 803,211

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Solution

The third proportional to 380,388 and 803,211 is: 1,696,025.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,388 : 803,211 = 803,211 : x
  2. Step 2: Convert to fraction form
    380,388/803,211 = 803,211/x
  3. Step 3: Cross multiply
    380,388x = 803,211 × 803,211
  4. Step 4: Simplify right side
    380,388x = 645,147,910,521
  5. Step 5: Solve for x
    x = 645,147,910,521/380,388
  6. Step 6: Final answer
    x = 1,696,025.93

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.