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Finding the Fourth Proportional to 638,459.76, 957,704.20 and 189,172.20

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Solution

The fourth proportional to 638,459.76, 957,704.20 and 189,172.20 is: 283,762.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,459.76 : 957,704.20 = 189,172.20 : x
  2. Step 2: Convert to fraction form
    638,459.76/957,704.20 = 189,172.20/x
  3. Step 3: Cross multiply
    638,459.76x = 957,704.20 × 189,172.20
  4. Step 4: Simplify right side
    638,459.76x = 181,171,010,463.24
  5. Step 5: Solve for x
    x = 181,171,010,463.24/638,459.76
  6. Step 6: Final answer
    x = 283,762.61

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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.