Home / 685,220.04-945,592.20-379,289.86

Finding the Fourth Proportional to 685,220.04, 945,592.20 and 379,289.86

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Solution

The fourth proportional to 685,220.04, 945,592.20 and 379,289.86 is: 523,413.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,220.04 : 945,592.20 = 379,289.86 : x
  2. Step 2: Convert to fraction form
    685,220.04/945,592.20 = 379,289.86/x
  3. Step 3: Cross multiply
    685,220.04x = 945,592.20 × 379,289.86
  4. Step 4: Simplify right side
    685,220.04x = 358,653,530,791.11
  5. Step 5: Solve for x
    x = 358,653,530,791.11/685,220.04
  6. Step 6: Final answer
    x = 523,413.66

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Double scale
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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.