Home / 305,449.26-421,519.86-178,100.25

Finding the Fourth Proportional to 305,449.26, 421,519.86 and 178,100.25

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Solution

The fourth proportional to 305,449.26, 421,519.86 and 178,100.25 is: 245,778.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,449.26 : 421,519.86 = 178,100.25 : x
  2. Step 2: Convert to fraction form
    305,449.26/421,519.86 = 178,100.25/x
  3. Step 3: Cross multiply
    305,449.26x = 421,519.86 × 178,100.25
  4. Step 4: Simplify right side
    305,449.26x = 75,072,792,445.97
  5. Step 5: Solve for x
    x = 75,072,792,445.97/305,449.26
  6. Step 6: Final answer
    x = 245,778.28

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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.