Home / 685,430.49-945,901.55-379,512.46

Finding the Fourth Proportional to 685,430.49, 945,901.55 and 379,512.46

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Solution

The fourth proportional to 685,430.49, 945,901.55 and 379,512.46 is: 523,731.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,430.49 : 945,901.55 = 379,512.46 : x
  2. Step 2: Convert to fraction form
    685,430.49/945,901.55 = 379,512.46/x
  3. Step 3: Cross multiply
    685,430.49x = 945,901.55 × 379,512.46
  4. Step 4: Simplify right side
    685,430.49x = 358,981,422,926.16
  5. Step 5: Solve for x
    x = 358,981,422,926.16/685,430.49
  6. Step 6: Final answer
    x = 523,731.33

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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.