Home / 685,430.60-945,923.78-379,506.97

Finding the Fourth Proportional to 685,430.60, 945,923.78 and 379,506.97

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Solution

The fourth proportional to 685,430.60, 945,923.78 and 379,506.97 is: 523,735.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,430.60 : 945,923.78 = 379,506.97 : x
  2. Step 2: Convert to fraction form
    685,430.60/945,923.78 = 379,506.97/x
  3. Step 3: Cross multiply
    685,430.60x = 945,923.78 × 379,506.97
  4. Step 4: Simplify right side
    685,430.60x = 358,984,660,971.59
  5. Step 5: Solve for x
    x = 358,984,660,971.59/685,430.60
  6. Step 6: Final answer
    x = 523,735.97

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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.