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Finding the Fourth Proportional to 321,880.80, 482,821.20 and 111,525.60

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Solution

The fourth proportional to 321,880.80, 482,821.20 and 111,525.60 is: 167,288.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,880.80 : 482,821.20 = 111,525.60 : x
  2. Step 2: Convert to fraction form
    321,880.80/482,821.20 = 111,525.60/x
  3. Step 3: Cross multiply
    321,880.80x = 482,821.20 × 111,525.60
  4. Step 4: Simplify right side
    321,880.80x = 53,846,924,022.72
  5. Step 5: Solve for x
    x = 53,846,924,022.72/321,880.80
  6. Step 6: Final answer
    x = 167,288.40

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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.