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Finding the Third Proportional to 319,634 and 689,083

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Solution

The third proportional to 319,634 and 689,083 is: 1,485,559.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,634 : 689,083 = 689,083 : x
  2. Step 2: Convert to fraction form
    319,634/689,083 = 689,083/x
  3. Step 3: Cross multiply
    319,634x = 689,083 × 689,083
  4. Step 4: Simplify right side
    319,634x = 474,835,380,889
  5. Step 5: Solve for x
    x = 474,835,380,889/319,634
  6. Step 6: Final answer
    x = 1,485,559.67

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.