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Finding the Third Proportional to 286,026 and 428,487

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Solution

The third proportional to 286,026 and 428,487 is: 641,903.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,026 : 428,487 = 428,487 : x
  2. Step 2: Convert to fraction form
    286,026/428,487 = 428,487/x
  3. Step 3: Cross multiply
    286,026x = 428,487 × 428,487
  4. Step 4: Simplify right side
    286,026x = 183,601,109,169
  5. Step 5: Solve for x
    x = 183,601,109,169/286,026
  6. Step 6: Final answer
    x = 641,903.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.