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Finding the Fourth Proportional to 392,608.96, 589,007.40 and 126,394.36

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Solution

The fourth proportional to 392,608.96, 589,007.40 and 126,394.36 is: 189,621.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,608.96 : 589,007.40 = 126,394.36 : x
  2. Step 2: Convert to fraction form
    392,608.96/589,007.40 = 126,394.36/x
  3. Step 3: Cross multiply
    392,608.96x = 589,007.40 × 126,394.36
  4. Step 4: Simplify right side
    392,608.96x = 74,447,213,358.26
  5. Step 5: Solve for x
    x = 74,447,213,358.26/392,608.96
  6. Step 6: Final answer
    x = 189,621.79

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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.