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Finding the Fourth Proportional to 392,740.40, 589,110.60 and 193,091.60

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Solution

The fourth proportional to 392,740.40, 589,110.60 and 193,091.60 is: 289,637.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,740.40 : 589,110.60 = 193,091.60 : x
  2. Step 2: Convert to fraction form
    392,740.40/589,110.60 = 193,091.60/x
  3. Step 3: Cross multiply
    392,740.40x = 589,110.60 × 193,091.60
  4. Step 4: Simplify right side
    392,740.40x = 113,752,308,330.96
  5. Step 5: Solve for x
    x = 113,752,308,330.96/392,740.40
  6. Step 6: Final answer
    x = 289,637.40

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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.