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Finding the Fourth Proportional to 393,172.29, 589,759.07 and 168,515.15

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Solution

The fourth proportional to 393,172.29, 589,759.07 and 168,515.15 is: 252,772.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,172.29 : 589,759.07 = 168,515.15 : x
  2. Step 2: Convert to fraction form
    393,172.29/589,759.07 = 168,515.15/x
  3. Step 3: Cross multiply
    393,172.29x = 589,759.07 × 168,515.15
  4. Step 4: Simplify right side
    393,172.29x = 99,383,334,353.54
  5. Step 5: Solve for x
    x = 99,383,334,353.54/393,172.29
  6. Step 6: Final answer
    x = 252,772.99

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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.