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Finding the Fourth Proportional to 1,985,987.60, 2,980,212.60 and 1,040,037.20

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Solution

The fourth proportional to 1,985,987.60, 2,980,212.60 and 1,040,037.20 is: 1,560,700.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985,987.60 : 2,980,212.60 = 1,040,037.20 : x
  2. Step 2: Convert to fraction form
    1,985,987.60/2,980,212.60 = 1,040,037.20/x
  3. Step 3: Cross multiply
    1,985,987.60x = 2,980,212.60 × 1,040,037.20
  4. Step 4: Simplify right side
    1,985,987.60x = 3,099,531,967,908.72
  5. Step 5: Solve for x
    x = 3,099,531,967,908.72/1,985,987.60
  6. Step 6: Final answer
    x = 1,560,700.56

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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.