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Finding the Fourth Proportional to 478,249.20, 659,958.60 and 274,289.60

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Solution

The fourth proportional to 478,249.20, 659,958.60 and 274,289.60 is: 378,505.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,249.20 : 659,958.60 = 274,289.60 : x
  2. Step 2: Convert to fraction form
    478,249.20/659,958.60 = 274,289.60/x
  3. Step 3: Cross multiply
    478,249.20x = 659,958.60 × 274,289.60
  4. Step 4: Simplify right side
    478,249.20x = 181,019,780,410.56
  5. Step 5: Solve for x
    x = 181,019,780,410.56/478,249.20
  6. Step 6: Final answer
    x = 378,505.14

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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.