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Finding the Third Proportional to 186,768 and 399,780

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Solution

The third proportional to 186,768 and 399,780 is: 855,735.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,768 : 399,780 = 399,780 : x
  2. Step 2: Convert to fraction form
    186,768/399,780 = 399,780/x
  3. Step 3: Cross multiply
    186,768x = 399,780 × 399,780
  4. Step 4: Simplify right side
    186,768x = 159,824,048,400
  5. Step 5: Solve for x
    x = 159,824,048,400/186,768
  6. Step 6: Final answer
    x = 855,735.72

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.