Home / 679,122.54-936,984.78-407,091.20

Finding the Fourth Proportional to 679,122.54, 936,984.78 and 407,091.20

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Solution

The fourth proportional to 679,122.54, 936,984.78 and 407,091.20 is: 561,663.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,122.54 : 936,984.78 = 407,091.20 : x
  2. Step 2: Convert to fraction form
    679,122.54/936,984.78 = 407,091.20/x
  3. Step 3: Cross multiply
    679,122.54x = 936,984.78 × 407,091.20
  4. Step 4: Simplify right side
    679,122.54x = 381,438,253,787.01
  5. Step 5: Solve for x
    x = 381,438,253,787.01/679,122.54
  6. Step 6: Final answer
    x = 561,663.37

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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.