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Finding the Third Proportional to 212,814 and 456,987

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Solution

The third proportional to 212,814 and 456,987 is: 981,312.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,814 : 456,987 = 456,987 : x
  2. Step 2: Convert to fraction form
    212,814/456,987 = 456,987/x
  3. Step 3: Cross multiply
    212,814x = 456,987 × 456,987
  4. Step 4: Simplify right side
    212,814x = 208,837,118,169
  5. Step 5: Solve for x
    x = 208,837,118,169/212,814
  6. Step 6: Final answer
    x = 981,312.87

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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.