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Finding the Fourth Proportional to 222,879.60, 333,865.80 and 138,380.40

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Solution

The fourth proportional to 222,879.60, 333,865.80 and 138,380.40 is: 207,288.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,879.60 : 333,865.80 = 138,380.40 : x
  2. Step 2: Convert to fraction form
    222,879.60/333,865.80 = 138,380.40/x
  3. Step 3: Cross multiply
    222,879.60x = 333,865.80 × 138,380.40
  4. Step 4: Simplify right side
    222,879.60x = 46,200,482,950.32
  5. Step 5: Solve for x
    x = 46,200,482,950.32/222,879.60
  6. Step 6: Final answer
    x = 207,288.97

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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.