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Finding the Fourth Proportional to 397,170.66, 548,099.22 and 215,883

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Solution

The fourth proportional to 397,170.66, 548,099.22 and 215,883 is: 297,920.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,170.66 : 548,099.22 = 215,883 : x
  2. Step 2: Convert to fraction form
    397,170.66/548,099.22 = 215,883/x
  3. Step 3: Cross multiply
    397,170.66x = 548,099.22 × 215,883
  4. Step 4: Simplify right side
    397,170.66x = 118,325,303,911.26
  5. Step 5: Solve for x
    x = 118,325,303,911.26/397,170.66
  6. Step 6: Final answer
    x = 297,920.56

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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.