Home / 728,115.21-1,004,803.66-405,845.74

Finding the Fourth Proportional to 728,115.21, 1,004,803.66 and 405,845.74

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Solution

The fourth proportional to 728,115.21, 1,004,803.66 and 405,845.74 is: 560,069.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,115.21 : 1,004,803.66 = 405,845.74 : x
  2. Step 2: Convert to fraction form
    728,115.21/1,004,803.66 = 405,845.74/x
  3. Step 3: Cross multiply
    728,115.21x = 1,004,803.66 × 405,845.74
  4. Step 4: Simplify right side
    728,115.21x = 407,795,284,947.41
  5. Step 5: Solve for x
    x = 407,795,284,947.41/728,115.21
  6. Step 6: Final answer
    x = 560,069.72

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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.