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Finding the Fourth Proportional to 397,190.99, 548,129.94 and 215,903.27

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Solution

The fourth proportional to 397,190.99, 548,129.94 and 215,903.27 is: 297,949.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,190.99 : 548,129.94 = 215,903.27 : x
  2. Step 2: Convert to fraction form
    397,190.99/548,129.94 = 215,903.27/x
  3. Step 3: Cross multiply
    397,190.99x = 548,129.94 × 215,903.27
  4. Step 4: Simplify right side
    397,190.99x = 118,343,046,991.59
  5. Step 5: Solve for x
    x = 118,343,046,991.59/397,190.99
  6. Step 6: Final answer
    x = 297,949.98

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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.