Home / 728,106.57-1,004,788.18-405,809.75

Finding the Fourth Proportional to 728,106.57, 1,004,788.18 and 405,809.75

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Solution

The fourth proportional to 728,106.57, 1,004,788.18 and 405,809.75 is: 560,018.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,106.57 : 1,004,788.18 = 405,809.75 : x
  2. Step 2: Convert to fraction form
    728,106.57/1,004,788.18 = 405,809.75/x
  3. Step 3: Cross multiply
    728,106.57x = 1,004,788.18 × 405,809.75
  4. Step 4: Simplify right side
    728,106.57x = 407,752,840,503.12
  5. Step 5: Solve for x
    x = 407,752,840,503.12/728,106.57
  6. Step 6: Final answer
    x = 560,018.07

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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.