Home / 684,890.27-945,065.76-394,596.80

Finding the Fourth Proportional to 684,890.27, 945,065.76 and 394,596.80

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Solution

The fourth proportional to 684,890.27, 945,065.76 and 394,596.80 is: 544,495.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,890.27 : 945,065.76 = 394,596.80 : x
  2. Step 2: Convert to fraction form
    684,890.27/945,065.76 = 394,596.80/x
  3. Step 3: Cross multiply
    684,890.27x = 945,065.76 × 394,596.80
  4. Step 4: Simplify right side
    684,890.27x = 372,919,924,685.57
  5. Step 5: Solve for x
    x = 372,919,924,685.57/684,890.27
  6. Step 6: Final answer
    x = 544,495.87

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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.