Home / 1,089,806.40-1,635,681.60-639,964.80

Finding the Fourth Proportional to 1,089,806.40, 1,635,681.60 and 639,964.80

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Solution

The fourth proportional to 1,089,806.40, 1,635,681.60 and 639,964.80 is: 960,517.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089,806.40 : 1,635,681.60 = 639,964.80 : x
  2. Step 2: Convert to fraction form
    1,089,806.40/1,635,681.60 = 639,964.80/x
  3. Step 3: Cross multiply
    1,089,806.40x = 1,635,681.60 × 639,964.80
  4. Step 4: Simplify right side
    1,089,806.40x = 1,046,778,648,007.68
  5. Step 5: Solve for x
    x = 1,046,778,648,007.68/1,089,806.40
  6. Step 6: Final answer
    x = 960,517.99

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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.