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Finding the Fourth Proportional to 321,907,619.70, 482,861,429.55 and 256,150,653.30

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Solution

The fourth proportional to 321,907,619.70, 482,861,429.55 and 256,150,653.30 is: 384,225,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,907,619.70 : 482,861,429.55 = 256,150,653.30 : x
  2. Step 2: Convert to fraction form
    321,907,619.70/482,861,429.55 = 256,150,653.30/x
  3. Step 3: Cross multiply
    321,907,619.70x = 482,861,429.55 × 256,150,653.30
  4. Step 4: Simplify right side
    321,907,619.70x = 123,685,270,632,604,432
  5. Step 5: Solve for x
    x = 123,685,270,632,604,432/321,907,619.70
  6. Step 6: Final answer
    x = 384,225,979.95

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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.