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Finding the Fourth Proportional to 638,321.78, 957,480.92 and 189,077.67

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Solution

The fourth proportional to 638,321.78, 957,480.92 and 189,077.67 is: 283,615.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,321.78 : 957,480.92 = 189,077.67 : x
  2. Step 2: Convert to fraction form
    638,321.78/957,480.92 = 189,077.67/x
  3. Step 3: Cross multiply
    638,321.78x = 957,480.92 × 189,077.67
  4. Step 4: Simplify right side
    638,321.78x = 181,038,264,951.70
  5. Step 5: Solve for x
    x = 181,038,264,951.70/638,321.78
  6. Step 6: Final answer
    x = 283,615.99

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.