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Finding the Third Proportional to 642,803.50 and 1,338,811.25

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Solution

The third proportional to 642,803.50 and 1,338,811.25 is: 2,788,434.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,803.50 : 1,338,811.25 = 1,338,811.25 : x
  2. Step 2: Convert to fraction form
    642,803.50/1,338,811.25 = 1,338,811.25/x
  3. Step 3: Cross multiply
    642,803.50x = 1,338,811.25 × 1,338,811.25
  4. Step 4: Simplify right side
    642,803.50x = 1,792,415,563,126.56
  5. Step 5: Solve for x
    x = 1,792,415,563,126.56/642,803.50
  6. Step 6: Final answer
    x = 2,788,434.67

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.