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Finding the Fourth Proportional to 638,416.74, 957,765.21 and 189,172.77

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Solution

The fourth proportional to 638,416.74, 957,765.21 and 189,172.77 is: 283,800.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,416.74 : 957,765.21 = 189,172.77 : x
  2. Step 2: Convert to fraction form
    638,416.74/957,765.21 = 189,172.77/x
  3. Step 3: Cross multiply
    638,416.74x = 957,765.21 × 189,172.77
  4. Step 4: Simplify right side
    638,416.74x = 181,183,094,548.41
  5. Step 5: Solve for x
    x = 181,183,094,548.41/638,416.74
  6. Step 6: Final answer
    x = 283,800.66

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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.