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Finding the Third Proportional to 331,398 and 692,316

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Solution

The third proportional to 331,398 and 692,316 is: 1,446,301.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,398 : 692,316 = 692,316 : x
  2. Step 2: Convert to fraction form
    331,398/692,316 = 692,316/x
  3. Step 3: Cross multiply
    331,398x = 692,316 × 692,316
  4. Step 4: Simplify right side
    331,398x = 479,301,443,856
  5. Step 5: Solve for x
    x = 479,301,443,856/331,398
  6. Step 6: Final answer
    x = 1,446,301.56

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.