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Finding the Fourth Proportional to 397,231.79, 548,173.42 and 215,948.29

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Solution

The fourth proportional to 397,231.79, 548,173.42 and 215,948.29 is: 298,005.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,231.79 : 548,173.42 = 215,948.29 : x
  2. Step 2: Convert to fraction form
    397,231.79/548,173.42 = 215,948.29/x
  3. Step 3: Cross multiply
    397,231.79x = 548,173.42 × 215,948.29
  4. Step 4: Simplify right side
    397,231.79x = 118,377,112,672.45
  5. Step 5: Solve for x
    x = 118,377,112,672.45/397,231.79
  6. Step 6: Final answer
    x = 298,005.13

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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.