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Finding the Third Proportional to 256,894 and 409,123

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Solution

The third proportional to 256,894 and 409,123 is: 651,559.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,894 : 409,123 = 409,123 : x
  2. Step 2: Convert to fraction form
    256,894/409,123 = 409,123/x
  3. Step 3: Cross multiply
    256,894x = 409,123 × 409,123
  4. Step 4: Simplify right side
    256,894x = 167,381,629,129
  5. Step 5: Solve for x
    x = 167,381,629,129/256,894
  6. Step 6: Final answer
    x = 651,559.12

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.