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Finding the Fourth Proportional to 352,309.12, 528,551.17 and 102,991.12

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Solution

The fourth proportional to 352,309.12, 528,551.17 and 102,991.12 is: 154,512.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,309.12 : 528,551.17 = 102,991.12 : x
  2. Step 2: Convert to fraction form
    352,309.12/528,551.17 = 102,991.12/x
  3. Step 3: Cross multiply
    352,309.12x = 528,551.17 × 102,991.12
  4. Step 4: Simplify right side
    352,309.12x = 54,436,075,396.75
  5. Step 5: Solve for x
    x = 54,436,075,396.75/352,309.12
  6. Step 6: Final answer
    x = 154,512.25

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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.