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Finding the Third Proportional to 390,861,618.75 and 859,188,235.50

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Solution

The third proportional to 390,861,618.75 and 859,188,235.50 is: 1,888,659,281.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,861,618.75 : 859,188,235.50 = 859,188,235.50 : x
  2. Step 2: Convert to fraction form
    390,861,618.75/859,188,235.50 = 859,188,235.50/x
  3. Step 3: Cross multiply
    390,861,618.75x = 859,188,235.50 × 859,188,235.50
  4. Step 4: Simplify right side
    390,861,618.75x = 738,204,424,021,603,456
  5. Step 5: Solve for x
    x = 738,204,424,021,603,456/390,861,618.75
  6. Step 6: Final answer
    x = 1,888,659,281.47

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.