Home / 1,428,313.20-2,142,469.80-430,911.60

Finding the Fourth Proportional to 1,428,313.20, 2,142,469.80 and 430,911.60

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Solution

The fourth proportional to 1,428,313.20, 2,142,469.80 and 430,911.60 is: 646,367.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,313.20 : 2,142,469.80 = 430,911.60 : x
  2. Step 2: Convert to fraction form
    1,428,313.20/2,142,469.80 = 430,911.60/x
  3. Step 3: Cross multiply
    1,428,313.20x = 2,142,469.80 × 430,911.60
  4. Step 4: Simplify right side
    1,428,313.20x = 923,215,089,469.68
  5. Step 5: Solve for x
    x = 923,215,089,469.68/1,428,313.20
  6. Step 6: Final answer
    x = 646,367.40

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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.