Home / 685,130.44-945,401.10-394,784.32

Finding the Fourth Proportional to 685,130.44, 945,401.10 and 394,784.32

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Solution

The fourth proportional to 685,130.44, 945,401.10 and 394,784.32 is: 544,756.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,130.44 : 945,401.10 = 394,784.32 : x
  2. Step 2: Convert to fraction form
    685,130.44/945,401.10 = 394,784.32/x
  3. Step 3: Cross multiply
    685,130.44x = 945,401.10 × 394,784.32
  4. Step 4: Simplify right side
    685,130.44x = 373,229,530,390.75
  5. Step 5: Solve for x
    x = 373,229,530,390.75/685,130.44
  6. Step 6: Final answer
    x = 544,756.89

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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.