Home / 728,124.12-1,004,815.92-405,854.64

Finding the Fourth Proportional to 728,124.12, 1,004,815.92 and 405,854.64

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Solution

The fourth proportional to 728,124.12, 1,004,815.92 and 405,854.64 is: 560,081.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,124.12 : 1,004,815.92 = 405,854.64 : x
  2. Step 2: Convert to fraction form
    728,124.12/1,004,815.92 = 405,854.64/x
  3. Step 3: Cross multiply
    728,124.12x = 1,004,815.92 × 405,854.64
  4. Step 4: Simplify right side
    728,124.12x = 407,809,203,477.87
  5. Step 5: Solve for x
    x = 407,809,203,477.87/728,124.12
  6. Step 6: Final answer
    x = 560,081.99

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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.