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Finding the Fourth Proportional to 397,267.81, 548,240.39 and 215,991.93

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Solution

The fourth proportional to 397,267.81, 548,240.39 and 215,991.93 is: 298,074.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,267.81 : 548,240.39 = 215,991.93 : x
  2. Step 2: Convert to fraction form
    397,267.81/548,240.39 = 215,991.93/x
  3. Step 3: Cross multiply
    397,267.81x = 548,240.39 × 215,991.93
  4. Step 4: Simplify right side
    397,267.81x = 118,415,501,725.96
  5. Step 5: Solve for x
    x = 118,415,501,725.96/397,267.81
  6. Step 6: Final answer
    x = 298,074.75

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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.