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Finding the Fourth Proportional to 383,151.69, 528,668.44 and 221,996.93

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Solution

The fourth proportional to 383,151.69, 528,668.44 and 221,996.93 is: 306,308.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,151.69 : 528,668.44 = 221,996.93 : x
  2. Step 2: Convert to fraction form
    383,151.69/528,668.44 = 221,996.93/x
  3. Step 3: Cross multiply
    383,151.69x = 528,668.44 × 221,996.93
  4. Step 4: Simplify right side
    383,151.69x = 117,362,767,469.56
  5. Step 5: Solve for x
    x = 117,362,767,469.56/383,151.69
  6. Step 6: Final answer
    x = 306,308.89

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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.