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Finding the Third Proportional to 256,762 and 393,807

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Solution

The third proportional to 256,762 and 393,807 is: 603,998.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,762 : 393,807 = 393,807 : x
  2. Step 2: Convert to fraction form
    256,762/393,807 = 393,807/x
  3. Step 3: Cross multiply
    256,762x = 393,807 × 393,807
  4. Step 4: Simplify right side
    256,762x = 155,083,953,249
  5. Step 5: Solve for x
    x = 155,083,953,249/256,762
  6. Step 6: Final answer
    x = 603,998.85

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.