Home / 213,815.20-320,799.60-206,135.20

Finding the Fourth Proportional to 213,815.20, 320,799.60 and 206,135.20

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Solution

The fourth proportional to 213,815.20, 320,799.60 and 206,135.20 is: 309,276.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,815.20 : 320,799.60 = 206,135.20 : x
  2. Step 2: Convert to fraction form
    213,815.20/320,799.60 = 206,135.20/x
  3. Step 3: Cross multiply
    213,815.20x = 320,799.60 × 206,135.20
  4. Step 4: Simplify right side
    213,815.20x = 66,128,089,705.92
  5. Step 5: Solve for x
    x = 66,128,089,705.92/213,815.20
  6. Step 6: Final answer
    x = 309,276.84

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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.