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Finding the Third Proportional to 4,378 and 6,783

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Solution

The third proportional to 4,378 and 6,783 is: 10,509.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,378 : 6,783 = 6,783 : x
  2. Step 2: Convert to fraction form
    4,378/6,783 = 6,783/x
  3. Step 3: Cross multiply
    4,378x = 6,783 × 6,783
  4. Step 4: Simplify right side
    4,378x = 46,009,089
  5. Step 5: Solve for x
    x = 46,009,089/4,378
  6. Step 6: Final answer
    x = 10,509.16

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.