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Finding the Fourth Proportional to 397,266.68, 548,238.83 and 215,990.80

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Solution

The fourth proportional to 397,266.68, 548,238.83 and 215,990.80 is: 298,073.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,266.68 : 548,238.83 = 215,990.80 : x
  2. Step 2: Convert to fraction form
    397,266.68/548,238.83 = 215,990.80/x
  3. Step 3: Cross multiply
    397,266.68x = 548,238.83 × 215,990.80
  4. Step 4: Simplify right side
    397,266.68x = 118,414,545,331.01
  5. Step 5: Solve for x
    x = 118,414,545,331.01/397,266.68
  6. Step 6: Final answer
    x = 298,073.19

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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.