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Finding the Fourth Proportional to 789,750, 1,089,855 and 427,173.84

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Solution

The fourth proportional to 789,750, 1,089,855 and 427,173.84 is: 589,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,750 : 1,089,855 = 427,173.84 : x
  2. Step 2: Convert to fraction form
    789,750/1,089,855 = 427,173.84/x
  3. Step 3: Cross multiply
    789,750x = 1,089,855 × 427,173.84
  4. Step 4: Simplify right side
    789,750x = 465,557,545,393.20
  5. Step 5: Solve for x
    x = 465,557,545,393.20/789,750
  6. Step 6: Final answer
    x = 589,499.90

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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.