Home / 1,389,823.80-2,089,190.10-1,291,212.60

Finding the Fourth Proportional to 1,389,823.80, 2,089,190.10 and 1,291,212.60

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Solution

The fourth proportional to 1,389,823.80, 2,089,190.10 and 1,291,212.60 is: 1,940,957.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,823.80 : 2,089,190.10 = 1,291,212.60 : x
  2. Step 2: Convert to fraction form
    1,389,823.80/2,089,190.10 = 1,291,212.60/x
  3. Step 3: Cross multiply
    1,389,823.80x = 2,089,190.10 × 1,291,212.60
  4. Step 4: Simplify right side
    1,389,823.80x = 2,697,588,580,915.26
  5. Step 5: Solve for x
    x = 2,697,588,580,915.26/1,389,823.80
  6. Step 6: Final answer
    x = 1,940,957.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.