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Finding the Fourth Proportional to 1,990,894.80, 2,984,009.40 and 1,491,675.60

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Solution

The fourth proportional to 1,990,894.80, 2,984,009.40 and 1,491,675.60 is: 2,235,765.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,894.80 : 2,984,009.40 = 1,491,675.60 : x
  2. Step 2: Convert to fraction form
    1,990,894.80/2,984,009.40 = 1,491,675.60/x
  3. Step 3: Cross multiply
    1,990,894.80x = 2,984,009.40 × 1,491,675.60
  4. Step 4: Simplify right side
    1,990,894.80x = 4,451,174,012,150.64
  5. Step 5: Solve for x
    x = 4,451,174,012,150.64/1,990,894.80
  6. Step 6: Final answer
    x = 2,235,765.55

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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.