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Finding the Third Proportional to 212,091 and 456,690

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Solution

The third proportional to 212,091 and 456,690 is: 983,378.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,091 : 456,690 = 456,690 : x
  2. Step 2: Convert to fraction form
    212,091/456,690 = 456,690/x
  3. Step 3: Cross multiply
    212,091x = 456,690 × 456,690
  4. Step 4: Simplify right side
    212,091x = 208,565,756,100
  5. Step 5: Solve for x
    x = 208,565,756,100/212,091
  6. Step 6: Final answer
    x = 983,378.63

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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.