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Finding the Fourth Proportional to 1,855,968.72, 2,561,442.12 and 1,040,305.20

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Solution

The fourth proportional to 1,855,968.72, 2,561,442.12 and 1,040,305.20 is: 1,435,736.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855,968.72 : 2,561,442.12 = 1,040,305.20 : x
  2. Step 2: Convert to fraction form
    1,855,968.72/2,561,442.12 = 1,040,305.20/x
  3. Step 3: Cross multiply
    1,855,968.72x = 2,561,442.12 × 1,040,305.20
  4. Step 4: Simplify right side
    1,855,968.72x = 2,664,681,556,935.02
  5. Step 5: Solve for x
    x = 2,664,681,556,935.02/1,855,968.72
  6. Step 6: Final answer
    x = 1,435,736.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.