Home / 305,629.20-421,799.40-178,297.20

Finding the Fourth Proportional to 305,629.20, 421,799.40 and 178,297.20

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Solution

The fourth proportional to 305,629.20, 421,799.40 and 178,297.20 is: 246,068.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,629.20 : 421,799.40 = 178,297.20 : x
  2. Step 2: Convert to fraction form
    305,629.20/421,799.40 = 178,297.20/x
  3. Step 3: Cross multiply
    305,629.20x = 421,799.40 × 178,297.20
  4. Step 4: Simplify right side
    305,629.20x = 75,205,651,981.68
  5. Step 5: Solve for x
    x = 75,205,651,981.68/305,629.20
  6. Step 6: Final answer
    x = 246,068.28

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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.