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Finding the Third Proportional to 240,820 and 381,640

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Solution

The third proportional to 240,820 and 381,640 is: 604,804.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,820 : 381,640 = 381,640 : x
  2. Step 2: Convert to fraction form
    240,820/381,640 = 381,640/x
  3. Step 3: Cross multiply
    240,820x = 381,640 × 381,640
  4. Step 4: Simplify right side
    240,820x = 145,649,089,600
  5. Step 5: Solve for x
    x = 145,649,089,600/240,820
  6. Step 6: Final answer
    x = 604,804.79

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.