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Finding the Fourth Proportional to 1,198,687.62, 1,798,047 and 399,969.15

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Solution

The fourth proportional to 1,198,687.62, 1,798,047 and 399,969.15 is: 599,958.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198,687.62 : 1,798,047 = 399,969.15 : x
  2. Step 2: Convert to fraction form
    1,198,687.62/1,798,047 = 399,969.15/x
  3. Step 3: Cross multiply
    1,198,687.62x = 1,798,047 × 399,969.15
  4. Step 4: Simplify right side
    1,198,687.62x = 719,163,330,250.05
  5. Step 5: Solve for x
    x = 719,163,330,250.05/1,198,687.62
  6. Step 6: Final answer
    x = 599,958.92

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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.