Home / 538,826.11-743,629.92-309,413.45

Finding the Fourth Proportional to 538,826.11, 743,629.92 and 309,413.45

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Solution

The fourth proportional to 538,826.11, 743,629.92 and 309,413.45 is: 427,019.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,826.11 : 743,629.92 = 309,413.45 : x
  2. Step 2: Convert to fraction form
    538,826.11/743,629.92 = 309,413.45/x
  3. Step 3: Cross multiply
    538,826.11x = 743,629.92 × 309,413.45
  4. Step 4: Simplify right side
    538,826.11x = 230,089,099,769.20
  5. Step 5: Solve for x
    x = 230,089,099,769.20/538,826.11
  6. Step 6: Final answer
    x = 427,019.21

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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.