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Finding the Fourth Proportional to 311,879.52, 429,945.84 and 222,300

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Solution

The fourth proportional to 311,879.52, 429,945.84 and 222,300 is: 306,454.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,879.52 : 429,945.84 = 222,300 : x
  2. Step 2: Convert to fraction form
    311,879.52/429,945.84 = 222,300/x
  3. Step 3: Cross multiply
    311,879.52x = 429,945.84 × 222,300
  4. Step 4: Simplify right side
    311,879.52x = 95,576,960,232
  5. Step 5: Solve for x
    x = 95,576,960,232/311,879.52
  6. Step 6: Final answer
    x = 306,454.75

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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.