Home / 1,422,336.80-2,128,256.40-1,296,365.60

Finding the Fourth Proportional to 1,422,336.80, 2,128,256.40 and 1,296,365.60

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Solution

The fourth proportional to 1,422,336.80, 2,128,256.40 and 1,296,365.60 is: 1,939,764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422,336.80 : 2,128,256.40 = 1,296,365.60 : x
  2. Step 2: Convert to fraction form
    1,422,336.80/2,128,256.40 = 1,296,365.60/x
  3. Step 3: Cross multiply
    1,422,336.80x = 2,128,256.40 × 1,296,365.60
  4. Step 4: Simplify right side
    1,422,336.80x = 2,758,998,384,939.84
  5. Step 5: Solve for x
    x = 2,758,998,384,939.84/1,422,336.80
  6. Step 6: Final answer
    x = 1,939,764.47

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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.