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Finding the Third Proportional to 318,387 and 692,988

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Solution

The third proportional to 318,387 and 692,988 is: 1,508,329.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,387 : 692,988 = 692,988 : x
  2. Step 2: Convert to fraction form
    318,387/692,988 = 692,988/x
  3. Step 3: Cross multiply
    318,387x = 692,988 × 692,988
  4. Step 4: Simplify right side
    318,387x = 480,232,368,144
  5. Step 5: Solve for x
    x = 480,232,368,144/318,387
  6. Step 6: Final answer
    x = 1,508,329.07

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.