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Finding the Fourth Proportional to 271,998.40, 407,997.60 and 256,446.40

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Solution

The fourth proportional to 271,998.40, 407,997.60 and 256,446.40 is: 384,669.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,998.40 : 407,997.60 = 256,446.40 : x
  2. Step 2: Convert to fraction form
    271,998.40/407,997.60 = 256,446.40/x
  3. Step 3: Cross multiply
    271,998.40x = 407,997.60 × 256,446.40
  4. Step 4: Simplify right side
    271,998.40x = 104,629,515,728.64
  5. Step 5: Solve for x
    x = 104,629,515,728.64/271,998.40
  6. Step 6: Final answer
    x = 384,669.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.