Home / 728,170.28-1,004,908.98-405,882.68

Finding the Fourth Proportional to 728,170.28, 1,004,908.98 and 405,882.68

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Solution

The fourth proportional to 728,170.28, 1,004,908.98 and 405,882.68 is: 560,137.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,170.28 : 1,004,908.98 = 405,882.68 : x
  2. Step 2: Convert to fraction form
    728,170.28/1,004,908.98 = 405,882.68/x
  3. Step 3: Cross multiply
    728,170.28x = 1,004,908.98 × 405,882.68
  4. Step 4: Simplify right side
    728,170.28x = 407,875,149,958.47
  5. Step 5: Solve for x
    x = 407,875,149,958.47/728,170.28
  6. Step 6: Final answer
    x = 560,137.05

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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.