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Finding the Third Proportional to 318,139.50 and 658,431.75

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Solution

The third proportional to 318,139.50 and 658,431.75 is: 1,362,711.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,139.50 : 658,431.75 = 658,431.75 : x
  2. Step 2: Convert to fraction form
    318,139.50/658,431.75 = 658,431.75/x
  3. Step 3: Cross multiply
    318,139.50x = 658,431.75 × 658,431.75
  4. Step 4: Simplify right side
    318,139.50x = 433,532,369,408.06
  5. Step 5: Solve for x
    x = 433,532,369,408.06/318,139.50
  6. Step 6: Final answer
    x = 1,362,711.54

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.