Home / 789,815.77-1,089,939-445,654.33

Finding the Fourth Proportional to 789,815.77, 1,089,939 and 445,654.33

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Solution

The fourth proportional to 789,815.77, 1,089,939 and 445,654.33 is: 614,999.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,815.77 : 1,089,939 = 445,654.33 : x
  2. Step 2: Convert to fraction form
    789,815.77/1,089,939 = 445,654.33/x
  3. Step 3: Cross multiply
    789,815.77x = 1,089,939 × 445,654.33
  4. Step 4: Simplify right side
    789,815.77x = 485,736,034,785.87
  5. Step 5: Solve for x
    x = 485,736,034,785.87/789,815.77
  6. Step 6: Final answer
    x = 614,999.16

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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.