Home / 505,899.36-698,155.20-279,559.44

Finding the Fourth Proportional to 505,899.36, 698,155.20 and 279,559.44

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Solution

The fourth proportional to 505,899.36, 698,155.20 and 279,559.44 is: 385,799.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,899.36 : 698,155.20 = 279,559.44 : x
  2. Step 2: Convert to fraction form
    505,899.36/698,155.20 = 279,559.44/x
  3. Step 3: Cross multiply
    505,899.36x = 698,155.20 × 279,559.44
  4. Step 4: Simplify right side
    505,899.36x = 195,175,876,745.09
  5. Step 5: Solve for x
    x = 195,175,876,745.09/505,899.36
  6. Step 6: Final answer
    x = 385,799.81

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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.