Home / 728,128.12-1,004,821.44-405,858.64

Finding the Fourth Proportional to 728,128.12, 1,004,821.44 and 405,858.64

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Solution

The fourth proportional to 728,128.12, 1,004,821.44 and 405,858.64 is: 560,087.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,128.12 : 1,004,821.44 = 405,858.64 : x
  2. Step 2: Convert to fraction form
    728,128.12/1,004,821.44 = 405,858.64/x
  3. Step 3: Cross multiply
    728,128.12x = 1,004,821.44 × 405,858.64
  4. Step 4: Simplify right side
    728,128.12x = 407,815,463,081.24
  5. Step 5: Solve for x
    x = 407,815,463,081.24/728,128.12
  6. Step 6: Final answer
    x = 560,087.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.