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Finding the Fourth Proportional to 5,147,797.72, 7,721,661.88 and 1,309,587.20

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Solution

The fourth proportional to 5,147,797.72, 7,721,661.88 and 1,309,587.20 is: 1,964,371.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147,797.72 : 7,721,661.88 = 1,309,587.20 : x
  2. Step 2: Convert to fraction form
    5,147,797.72/7,721,661.88 = 1,309,587.20/x
  3. Step 3: Cross multiply
    5,147,797.72x = 7,721,661.88 × 1,309,587.20
  4. Step 4: Simplify right side
    5,147,797.72x = 10,112,189,560,775.94
  5. Step 5: Solve for x
    x = 10,112,189,560,775.94/5,147,797.72
  6. Step 6: Final answer
    x = 1,964,371.97

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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.