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Finding the Fourth Proportional to 373,221, 515,112.48 and 220,249.80

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Solution

The fourth proportional to 373,221, 515,112.48 and 220,249.80 is: 303,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,221 : 515,112.48 = 220,249.80 : x
  2. Step 2: Convert to fraction form
    373,221/515,112.48 = 220,249.80/x
  3. Step 3: Cross multiply
    373,221x = 515,112.48 × 220,249.80
  4. Step 4: Simplify right side
    373,221x = 113,453,420,697.50
  5. Step 5: Solve for x
    x = 113,453,420,697.50/373,221
  6. Step 6: Final answer
    x = 303,984.56

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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.