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Finding the Fourth Proportional to 318,735.81, 439,856.73 and 191,413.53

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Solution

The fourth proportional to 318,735.81, 439,856.73 and 191,413.53 is: 264,151.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,735.81 : 439,856.73 = 191,413.53 : x
  2. Step 2: Convert to fraction form
    318,735.81/439,856.73 = 191,413.53/x
  3. Step 3: Cross multiply
    318,735.81x = 439,856.73 × 191,413.53
  4. Step 4: Simplify right side
    318,735.81x = 84,194,529,383.56
  5. Step 5: Solve for x
    x = 84,194,529,383.56/318,735.81
  6. Step 6: Final answer
    x = 264,151.46

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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.