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Finding the Fourth Proportional to 393,376.40, 589,627.20 and 168,698.60

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Solution

The fourth proportional to 393,376.40, 589,627.20 and 168,698.60 is: 252,860.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,376.40 : 589,627.20 = 168,698.60 : x
  2. Step 2: Convert to fraction form
    393,376.40/589,627.20 = 168,698.60/x
  3. Step 3: Cross multiply
    393,376.40x = 589,627.20 × 168,698.60
  4. Step 4: Simplify right side
    393,376.40x = 99,469,283,161.92
  5. Step 5: Solve for x
    x = 99,469,283,161.92/393,376.40
  6. Step 6: Final answer
    x = 252,860.32

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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.