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Finding the Third Proportional to 320,492 and 692,379

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Solution

The third proportional to 320,492 and 692,379 is: 1,495,789.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,492 : 692,379 = 692,379 : x
  2. Step 2: Convert to fraction form
    320,492/692,379 = 692,379/x
  3. Step 3: Cross multiply
    320,492x = 692,379 × 692,379
  4. Step 4: Simplify right side
    320,492x = 479,388,679,641
  5. Step 5: Solve for x
    x = 479,388,679,641/320,492
  6. Step 6: Final answer
    x = 1,495,789.85

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.