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Finding the Fourth Proportional to 321,907,615.20, 482,861,422.80 and 256,150,648.80

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Solution

The fourth proportional to 321,907,615.20, 482,861,422.80 and 256,150,648.80 is: 384,225,973.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,907,615.20 : 482,861,422.80 = 256,150,648.80 : x
  2. Step 2: Convert to fraction form
    321,907,615.20/482,861,422.80 = 256,150,648.80/x
  3. Step 3: Cross multiply
    321,907,615.20x = 482,861,422.80 × 256,150,648.80
  4. Step 4: Simplify right side
    321,907,615.20x = 123,685,266,730,711,120
  5. Step 5: Solve for x
    x = 123,685,266,730,711,120/321,907,615.20
  6. Step 6: Final answer
    x = 384,225,973.20

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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.