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Finding the Fourth Proportional to 3,986,358.05, 5,980,487.43 and 1,290,684.07

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Solution

The fourth proportional to 3,986,358.05, 5,980,487.43 and 1,290,684.07 is: 1,936,333.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986,358.05 : 5,980,487.43 = 1,290,684.07 : x
  2. Step 2: Convert to fraction form
    3,986,358.05/5,980,487.43 = 1,290,684.07/x
  3. Step 3: Cross multiply
    3,986,358.05x = 5,980,487.43 × 1,290,684.07
  4. Step 4: Simplify right side
    3,986,358.05x = 7,718,919,861,791.82
  5. Step 5: Solve for x
    x = 7,718,919,861,791.82/3,986,358.05
  6. Step 6: Final answer
    x = 1,936,333.81

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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.