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Finding the Third Proportional to 138,312 and 303,408

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Solution

The third proportional to 138,312 and 303,408 is: 665,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,312 : 303,408 = 303,408 : x
  2. Step 2: Convert to fraction form
    138,312/303,408 = 303,408/x
  3. Step 3: Cross multiply
    138,312x = 303,408 × 303,408
  4. Step 4: Simplify right side
    138,312x = 92,056,414,464
  5. Step 5: Solve for x
    x = 92,056,414,464/138,312
  6. Step 6: Final answer
    x = 665,570.70

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.