Home / 789,720.32-1,089,814.12-427,144.20

Finding the Fourth Proportional to 789,720.32, 1,089,814.12 and 427,144.20

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Solution

The fourth proportional to 789,720.32, 1,089,814.12 and 427,144.20 is: 589,459.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,720.32 : 1,089,814.12 = 427,144.20 : x
  2. Step 2: Convert to fraction form
    789,720.32/1,089,814.12 = 427,144.20/x
  3. Step 3: Cross multiply
    789,720.32x = 1,089,814.12 × 427,144.20
  4. Step 4: Simplify right side
    789,720.32x = 465,507,780,436.10
  5. Step 5: Solve for x
    x = 465,507,780,436.10/789,720.32
  6. Step 6: Final answer
    x = 589,459.04

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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.