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Finding the Fourth Proportional to 694,219.65, 958,111.84 and 388,313.03

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Solution

The fourth proportional to 694,219.65, 958,111.84 and 388,313.03 is: 535,921.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,219.65 : 958,111.84 = 388,313.03 : x
  2. Step 2: Convert to fraction form
    694,219.65/958,111.84 = 388,313.03/x
  3. Step 3: Cross multiply
    694,219.65x = 958,111.84 × 388,313.03
  4. Step 4: Simplify right side
    694,219.65x = 372,047,311,669.28
  5. Step 5: Solve for x
    x = 372,047,311,669.28/694,219.65
  6. Step 6: Final answer
    x = 535,921.61

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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.