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Finding the Fourth Proportional to 397,138.44, 548,056.60 and 215,850.32

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Solution

The fourth proportional to 397,138.44, 548,056.60 and 215,850.32 is: 297,876.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,138.44 : 548,056.60 = 215,850.32 : x
  2. Step 2: Convert to fraction form
    397,138.44/548,056.60 = 215,850.32/x
  3. Step 3: Cross multiply
    397,138.44x = 548,056.60 × 215,850.32
  4. Step 4: Simplify right side
    397,138.44x = 118,298,189,208.20
  5. Step 5: Solve for x
    x = 118,298,189,208.20/397,138.44
  6. Step 6: Final answer
    x = 297,876.45

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1.5x scale

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.