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Finding the Fourth Proportional to 393,668.16, 590,216.16 and 156,939.84

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Solution

The fourth proportional to 393,668.16, 590,216.16 and 156,939.84 is: 235,295.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,668.16 : 590,216.16 = 156,939.84 : x
  2. Step 2: Convert to fraction form
    393,668.16/590,216.16 = 156,939.84/x
  3. Step 3: Cross multiply
    393,668.16x = 590,216.16 × 156,939.84
  4. Step 4: Simplify right side
    393,668.16x = 92,628,429,715.81
  5. Step 5: Solve for x
    x = 92,628,429,715.81/393,668.16
  6. Step 6: Final answer
    x = 235,295.71

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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.