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Finding the Fourth Proportional to 1,098,891.80, 1,648,629.30 and 388,845.80

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Solution

The fourth proportional to 1,098,891.80, 1,648,629.30 and 388,845.80 is: 583,371.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098,891.80 : 1,648,629.30 = 388,845.80 : x
  2. Step 2: Convert to fraction form
    1,098,891.80/1,648,629.30 = 388,845.80/x
  3. Step 3: Cross multiply
    1,098,891.80x = 1,648,629.30 × 388,845.80
  4. Step 4: Simplify right side
    1,098,891.80x = 641,062,579,061.94
  5. Step 5: Solve for x
    x = 641,062,579,061.94/1,098,891.80
  6. Step 6: Final answer
    x = 583,371.88

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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.