Home / 789,159.18-1,089,037.53-449,629.86

Finding the Fourth Proportional to 789,159.18, 1,089,037.53 and 449,629.86

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Solution

The fourth proportional to 789,159.18, 1,089,037.53 and 449,629.86 is: 620,487.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,159.18 : 1,089,037.53 = 449,629.86 : x
  2. Step 2: Convert to fraction form
    789,159.18/1,089,037.53 = 449,629.86/x
  3. Step 3: Cross multiply
    789,159.18x = 1,089,037.53 × 449,629.86
  4. Step 4: Simplify right side
    789,159.18x = 489,663,792,148.65
  5. Step 5: Solve for x
    x = 489,663,792,148.65/789,159.18
  6. Step 6: Final answer
    x = 620,487.99

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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.