Home / 728,115.38-1,004,803.88-405,845.90

Finding the Fourth Proportional to 728,115.38, 1,004,803.88 and 405,845.90

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Solution

The fourth proportional to 728,115.38, 1,004,803.88 and 405,845.90 is: 560,069.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,115.38 : 1,004,803.88 = 405,845.90 : x
  2. Step 2: Convert to fraction form
    728,115.38/1,004,803.88 = 405,845.90/x
  3. Step 3: Cross multiply
    728,115.38x = 1,004,803.88 × 405,845.90
  4. Step 4: Simplify right side
    728,115.38x = 407,795,532,972.86
  5. Step 5: Solve for x
    x = 407,795,532,972.86/728,115.38
  6. Step 6: Final answer
    x = 560,069.94

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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.