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Finding the Third Proportional to 316,620 and 646,158

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Solution

The third proportional to 316,620 and 646,158 is: 1,318,679.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,620 : 646,158 = 646,158 : x
  2. Step 2: Convert to fraction form
    316,620/646,158 = 646,158/x
  3. Step 3: Cross multiply
    316,620x = 646,158 × 646,158
  4. Step 4: Simplify right side
    316,620x = 417,520,160,964
  5. Step 5: Solve for x
    x = 417,520,160,964/316,620
  6. Step 6: Final answer
    x = 1,318,679.05

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.