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Finding the Fourth Proportional to 1,986,097.60, 2,980,377.60 and 1,040,147.20

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Solution

The fourth proportional to 1,986,097.60, 2,980,377.60 and 1,040,147.20 is: 1,560,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,097.60 : 2,980,377.60 = 1,040,147.20 : x
  2. Step 2: Convert to fraction form
    1,986,097.60/2,980,377.60 = 1,040,147.20/x
  3. Step 3: Cross multiply
    1,986,097.60x = 2,980,377.60 × 1,040,147.20
  4. Step 4: Simplify right side
    1,986,097.60x = 3,100,031,415,582.72
  5. Step 5: Solve for x
    x = 3,100,031,415,582.72/1,986,097.60
  6. Step 6: Final answer
    x = 1,560,865.60

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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.