Home / 685,220.39-945,592.68-379,290.20

Finding the Fourth Proportional to 685,220.39, 945,592.68 and 379,290.20

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Solution

The fourth proportional to 685,220.39, 945,592.68 and 379,290.20 is: 523,414.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,220.39 : 945,592.68 = 379,290.20 : x
  2. Step 2: Convert to fraction form
    685,220.39/945,592.68 = 379,290.20/x
  3. Step 3: Cross multiply
    685,220.39x = 945,592.68 × 379,290.20
  4. Step 4: Simplify right side
    685,220.39x = 358,654,040,502.06
  5. Step 5: Solve for x
    x = 358,654,040,502.06/685,220.39
  6. Step 6: Final answer
    x = 523,414.14

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Double scale
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Similar ratio
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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.