Home / 789,640.88-1,089,704.40-427,064.73

Finding the Fourth Proportional to 789,640.88, 1,089,704.40 and 427,064.73

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Solution

The fourth proportional to 789,640.88, 1,089,704.40 and 427,064.73 is: 589,349.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,640.88 : 1,089,704.40 = 427,064.73 : x
  2. Step 2: Convert to fraction form
    789,640.88/1,089,704.40 = 427,064.73/x
  3. Step 3: Cross multiply
    789,640.88x = 1,089,704.40 × 427,064.73
  4. Step 4: Simplify right side
    789,640.88x = 465,374,315,365.81
  5. Step 5: Solve for x
    x = 465,374,315,365.81/789,640.88
  6. Step 6: Final answer
    x = 589,349.32

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Double scale
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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.