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Finding the Third Proportional to 147,322 and 312,172

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Solution

The third proportional to 147,322 and 312,172 is: 661,485.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,322 : 312,172 = 312,172 : x
  2. Step 2: Convert to fraction form
    147,322/312,172 = 312,172/x
  3. Step 3: Cross multiply
    147,322x = 312,172 × 312,172
  4. Step 4: Simplify right side
    147,322x = 97,451,357,584
  5. Step 5: Solve for x
    x = 97,451,357,584/147,322
  6. Step 6: Final answer
    x = 661,485.44

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.