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Finding the Fourth Proportional to 378,560.88, 522,413.01 and 217,426.37

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Solution

The fourth proportional to 378,560.88, 522,413.01 and 217,426.37 is: 300,047.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,560.88 : 522,413.01 = 217,426.37 : x
  2. Step 2: Convert to fraction form
    378,560.88/522,413.01 = 217,426.37/x
  3. Step 3: Cross multiply
    378,560.88x = 522,413.01 × 217,426.37
  4. Step 4: Simplify right side
    378,560.88x = 113,586,361,793.01
  5. Step 5: Solve for x
    x = 113,586,361,793.01/378,560.88
  6. Step 6: Final answer
    x = 300,047.81

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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.