Home / 213,739.20-321,069.60-205,905.60

Finding the Fourth Proportional to 213,739.20, 321,069.60 and 205,905.60

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Solution

The fourth proportional to 213,739.20, 321,069.60 and 205,905.60 is: 309,302.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,739.20 : 321,069.60 = 205,905.60 : x
  2. Step 2: Convert to fraction form
    213,739.20/321,069.60 = 205,905.60/x
  3. Step 3: Cross multiply
    213,739.20x = 321,069.60 × 205,905.60
  4. Step 4: Simplify right side
    213,739.20x = 66,110,028,629.76
  5. Step 5: Solve for x
    x = 66,110,028,629.76/213,739.20
  6. Step 6: Final answer
    x = 309,302.31

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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.