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Finding the Fourth Proportional to 693,785.62, 957,719.27 and 421,940.83

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Solution

The fourth proportional to 693,785.62, 957,719.27 and 421,940.83 is: 582,457.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,785.62 : 957,719.27 = 421,940.83 : x
  2. Step 2: Convert to fraction form
    693,785.62/957,719.27 = 421,940.83/x
  3. Step 3: Cross multiply
    693,785.62x = 957,719.27 × 421,940.83
  4. Step 4: Simplify right side
    693,785.62x = 404,100,864,745.65
  5. Step 5: Solve for x
    x = 404,100,864,745.65/693,785.62
  6. Step 6: Final answer
    x = 582,457.83

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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.