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Finding the Fourth Proportional to 394,365.51, 543,586.86 and 308,174.72

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Solution

The fourth proportional to 394,365.51, 543,586.86 and 308,174.72 is: 424,782.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,365.51 : 543,586.86 = 308,174.72 : x
  2. Step 2: Convert to fraction form
    394,365.51/543,586.86 = 308,174.72/x
  3. Step 3: Cross multiply
    394,365.51x = 543,586.86 × 308,174.72
  4. Step 4: Simplify right side
    394,365.51x = 167,519,725,658.25
  5. Step 5: Solve for x
    x = 167,519,725,658.25/394,365.51
  6. Step 6: Final answer
    x = 424,782.90

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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.