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Finding the Fourth Proportional to 685,219.67, 945,591.69 and 379,289.48

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Solution

The fourth proportional to 685,219.67, 945,591.69 and 379,289.48 is: 523,413.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,219.67 : 945,591.69 = 379,289.48 : x
  2. Step 2: Convert to fraction form
    685,219.67/945,591.69 = 379,289.48/x
  3. Step 3: Cross multiply
    685,219.67x = 945,591.69 × 379,289.48
  4. Step 4: Simplify right side
    685,219.67x = 358,652,980,859.95
  5. Step 5: Solve for x
    x = 358,652,980,859.95/685,219.67
  6. Step 6: Final answer
    x = 523,413.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.