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Finding the Fourth Proportional to 393,329.97, 589,998.36 and 127,090.50

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Solution

The fourth proportional to 393,329.97, 589,998.36 and 127,090.50 is: 190,636.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,329.97 : 589,998.36 = 127,090.50 : x
  2. Step 2: Convert to fraction form
    393,329.97/589,998.36 = 127,090.50/x
  3. Step 3: Cross multiply
    393,329.97x = 589,998.36 × 127,090.50
  4. Step 4: Simplify right side
    393,329.97x = 74,983,186,571.58
  5. Step 5: Solve for x
    x = 74,983,186,571.58/393,329.97
  6. Step 6: Final answer
    x = 190,636.85

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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.