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Finding the Fourth Proportional to 1,855,999.80, 2,788,146.90 and 1,785,497.40

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Solution

The fourth proportional to 1,855,999.80, 2,788,146.90 and 1,785,497.40 is: 2,682,235.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855,999.80 : 2,788,146.90 = 1,785,497.40 : x
  2. Step 2: Convert to fraction form
    1,855,999.80/2,788,146.90 = 1,785,497.40/x
  3. Step 3: Cross multiply
    1,855,999.80x = 2,788,146.90 × 1,785,497.40
  4. Step 4: Simplify right side
    1,855,999.80x = 4,978,229,040,768.06
  5. Step 5: Solve for x
    x = 4,978,229,040,768.06/1,855,999.80
  6. Step 6: Final answer
    x = 2,682,235.76

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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.