Home / 310,845.21-428,928.06-196,080.54

Finding the Fourth Proportional to 310,845.21, 428,928.06 and 196,080.54

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Solution

The fourth proportional to 310,845.21, 428,928.06 and 196,080.54 is: 270,566.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,845.21 : 428,928.06 = 196,080.54 : x
  2. Step 2: Convert to fraction form
    310,845.21/428,928.06 = 196,080.54/x
  3. Step 3: Cross multiply
    310,845.21x = 428,928.06 × 196,080.54
  4. Step 4: Simplify right side
    310,845.21x = 84,104,445,625.95
  5. Step 5: Solve for x
    x = 84,104,445,625.95/310,845.21
  6. Step 6: Final answer
    x = 270,566.97

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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.