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Finding the Fourth Proportional to 494,055.36, 681,831 and 279,215.28

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Solution

The fourth proportional to 494,055.36, 681,831 and 279,215.28 is: 385,336.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,055.36 : 681,831 = 279,215.28 : x
  2. Step 2: Convert to fraction form
    494,055.36/681,831 = 279,215.28/x
  3. Step 3: Cross multiply
    494,055.36x = 681,831 × 279,215.28
  4. Step 4: Simplify right side
    494,055.36x = 190,377,633,577.68
  5. Step 5: Solve for x
    x = 190,377,633,577.68/494,055.36
  6. Step 6: Final answer
    x = 385,336.64

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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.