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Finding the Fourth Proportional to 800,025.65, 1,200,039.64 and 326,711.01

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Solution

The fourth proportional to 800,025.65, 1,200,039.64 and 326,711.01 is: 490,066.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,025.65 : 1,200,039.64 = 326,711.01 : x
  2. Step 2: Convert to fraction form
    800,025.65/1,200,039.64 = 326,711.01/x
  3. Step 3: Cross multiply
    800,025.65x = 1,200,039.64 × 326,711.01
  4. Step 4: Simplify right side
    800,025.65x = 392,066,162,824.44
  5. Step 5: Solve for x
    x = 392,066,162,824.44/800,025.65
  6. Step 6: Final answer
    x = 490,066.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.