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Finding the Fourth Proportional to 393,015.68, 589,030.23 and 168,111.77

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Solution

The fourth proportional to 393,015.68, 589,030.23 and 168,111.77 is: 251,956.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,015.68 : 589,030.23 = 168,111.77 : x
  2. Step 2: Convert to fraction form
    393,015.68/589,030.23 = 168,111.77/x
  3. Step 3: Cross multiply
    393,015.68x = 589,030.23 × 168,111.77
  4. Step 4: Simplify right side
    393,015.68x = 99,022,914,548.81
  5. Step 5: Solve for x
    x = 99,022,914,548.81/393,015.68
  6. Step 6: Final answer
    x = 251,956.65

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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.