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Finding the Fourth Proportional to 393,348.22, 589,859.67 and 123,386.31

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Solution

The fourth proportional to 393,348.22, 589,859.67 and 123,386.31 is: 185,028.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,348.22 : 589,859.67 = 123,386.31 : x
  2. Step 2: Convert to fraction form
    393,348.22/589,859.67 = 123,386.31/x
  3. Step 3: Cross multiply
    393,348.22x = 589,859.67 × 123,386.31
  4. Step 4: Simplify right side
    393,348.22x = 72,780,608,099.12
  5. Step 5: Solve for x
    x = 72,780,608,099.12/393,348.22
  6. Step 6: Final answer
    x = 185,028.44

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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.