Home / 1,089,421.20-1,630,906.20-810,176.40

Finding the Fourth Proportional to 1,089,421.20, 1,630,906.20 and 810,176.40

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Solution

The fourth proportional to 1,089,421.20, 1,630,906.20 and 810,176.40 is: 1,212,865.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089,421.20 : 1,630,906.20 = 810,176.40 : x
  2. Step 2: Convert to fraction form
    1,089,421.20/1,630,906.20 = 810,176.40/x
  3. Step 3: Cross multiply
    1,089,421.20x = 1,630,906.20 × 810,176.40
  4. Step 4: Simplify right side
    1,089,421.20x = 1,321,321,713,853.68
  5. Step 5: Solve for x
    x = 1,321,321,713,853.68/1,089,421.20
  6. Step 6: Final answer
    x = 1,212,865.80

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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.