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Finding the Fourth Proportional to 290,568.06, 435,040.07 and 156,969.70

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Solution

The fourth proportional to 290,568.06, 435,040.07 and 156,969.70 is: 235,015.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,568.06 : 435,040.07 = 156,969.70 : x
  2. Step 2: Convert to fraction form
    290,568.06/435,040.07 = 156,969.70/x
  3. Step 3: Cross multiply
    290,568.06x = 435,040.07 × 156,969.70
  4. Step 4: Simplify right side
    290,568.06x = 68,288,107,403.43
  5. Step 5: Solve for x
    x = 68,288,107,403.43/290,568.06
  6. Step 6: Final answer
    x = 235,015.88

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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.