Home / 728,253.20-1,004,989.59-405,956.36

Finding the Fourth Proportional to 728,253.20, 1,004,989.59 and 405,956.36

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Solution

The fourth proportional to 728,253.20, 1,004,989.59 and 405,956.36 is: 560,219.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,253.20 : 1,004,989.59 = 405,956.36 : x
  2. Step 2: Convert to fraction form
    728,253.20/1,004,989.59 = 405,956.36/x
  3. Step 3: Cross multiply
    728,253.20x = 1,004,989.59 × 405,956.36
  4. Step 4: Simplify right side
    728,253.20x = 407,981,910,769.34
  5. Step 5: Solve for x
    x = 407,981,910,769.34/728,253.20
  6. Step 6: Final answer
    x = 560,219.87

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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.