Home / 1,089,986.40-1,634,785.20-689,911.20

Finding the Fourth Proportional to 1,089,986.40, 1,634,785.20 and 689,911.20

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Solution

The fourth proportional to 1,089,986.40, 1,634,785.20 and 689,911.20 is: 1,034,743.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089,986.40 : 1,634,785.20 = 689,911.20 : x
  2. Step 2: Convert to fraction form
    1,089,986.40/1,634,785.20 = 689,911.20/x
  3. Step 3: Cross multiply
    1,089,986.40x = 1,634,785.20 × 689,911.20
  4. Step 4: Simplify right side
    1,089,986.40x = 1,127,856,619,074.24
  5. Step 5: Solve for x
    x = 1,127,856,619,074.24/1,089,986.40
  6. Step 6: Final answer
    x = 1,034,743.75

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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.