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Finding the Third Proportional to 641,928 and 993,429

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Solution

The third proportional to 641,928 and 993,429 is: 1,537,401.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,928 : 993,429 = 993,429 : x
  2. Step 2: Convert to fraction form
    641,928/993,429 = 993,429/x
  3. Step 3: Cross multiply
    641,928x = 993,429 × 993,429
  4. Step 4: Simplify right side
    641,928x = 986,901,178,041
  5. Step 5: Solve for x
    x = 986,901,178,041/641,928
  6. Step 6: Final answer
    x = 1,537,401.67

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.