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Finding the Third Proportional to 305,712 and 407,726

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Solution

The third proportional to 305,712 and 407,726 is: 543,781.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,712 : 407,726 = 407,726 : x
  2. Step 2: Convert to fraction form
    305,712/407,726 = 407,726/x
  3. Step 3: Cross multiply
    305,712x = 407,726 × 407,726
  4. Step 4: Simplify right side
    305,712x = 166,240,491,076
  5. Step 5: Solve for x
    x = 166,240,491,076/305,712
  6. Step 6: Final answer
    x = 543,781.37

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.