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Finding the Fourth Proportional to 320,512.14, 480,879.72 and 120,889.80

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Solution

The fourth proportional to 320,512.14, 480,879.72 and 120,889.80 is: 181,376.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,512.14 : 480,879.72 = 120,889.80 : x
  2. Step 2: Convert to fraction form
    320,512.14/480,879.72 = 120,889.80/x
  3. Step 3: Cross multiply
    320,512.14x = 480,879.72 × 120,889.80
  4. Step 4: Simplify right side
    320,512.14x = 58,133,453,174.86
  5. Step 5: Solve for x
    x = 58,133,453,174.86/320,512.14
  6. Step 6: Final answer
    x = 181,376.76

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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.