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Finding the Fourth Proportional to 789,641.30, 1,089,704.99 and 427,065.15

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Solution

The fourth proportional to 789,641.30, 1,089,704.99 and 427,065.15 is: 589,349.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,641.30 : 1,089,704.99 = 427,065.15 : x
  2. Step 2: Convert to fraction form
    789,641.30/1,089,704.99 = 427,065.15/x
  3. Step 3: Cross multiply
    789,641.30x = 1,089,704.99 × 427,065.15
  4. Step 4: Simplify right side
    789,641.30x = 465,375,025,010.10
  5. Step 5: Solve for x
    x = 465,375,025,010.10/789,641.30
  6. Step 6: Final answer
    x = 589,349.90

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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.