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Finding the Third Proportional to 431,316 and 675,243

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Solution

The third proportional to 431,316 and 675,243 is: 1,057,120.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,316 : 675,243 = 675,243 : x
  2. Step 2: Convert to fraction form
    431,316/675,243 = 675,243/x
  3. Step 3: Cross multiply
    431,316x = 675,243 × 675,243
  4. Step 4: Simplify right side
    431,316x = 455,953,109,049
  5. Step 5: Solve for x
    x = 455,953,109,049/431,316
  6. Step 6: Final answer
    x = 1,057,120.79

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.