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Finding the Third Proportional to 277,890 and 430,563

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Solution

The third proportional to 277,890 and 430,563 is: 667,114.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    277,890 : 430,563 = 430,563 : x
  2. Step 2: Convert to fraction form
    277,890/430,563 = 430,563/x
  3. Step 3: Cross multiply
    277,890x = 430,563 × 430,563
  4. Step 4: Simplify right side
    277,890x = 185,384,496,969
  5. Step 5: Solve for x
    x = 185,384,496,969/277,890
  6. Step 6: Final answer
    x = 667,114.67

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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.