Home / 728,115.03-1,004,803.40-405,845.56

Finding the Fourth Proportional to 728,115.03, 1,004,803.40 and 405,845.56

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Solution

The fourth proportional to 728,115.03, 1,004,803.40 and 405,845.56 is: 560,069.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,115.03 : 1,004,803.40 = 405,845.56 : x
  2. Step 2: Convert to fraction form
    728,115.03/1,004,803.40 = 405,845.56/x
  3. Step 3: Cross multiply
    728,115.03x = 1,004,803.40 × 405,845.56
  4. Step 4: Simplify right side
    728,115.03x = 407,794,998,562.90
  5. Step 5: Solve for x
    x = 407,794,998,562.90/728,115.03
  6. Step 6: Final answer
    x = 560,069.47

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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.