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Finding the Fourth Proportional to 1,787,745.80, 2,681,618.70 and 1,591,790.60

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Solution

The fourth proportional to 1,787,745.80, 2,681,618.70 and 1,591,790.60 is: 2,387,685.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787,745.80 : 2,681,618.70 = 1,591,790.60 : x
  2. Step 2: Convert to fraction form
    1,787,745.80/2,681,618.70 = 1,591,790.60/x
  3. Step 3: Cross multiply
    1,787,745.80x = 2,681,618.70 × 1,591,790.60
  4. Step 4: Simplify right side
    1,787,745.80x = 4,268,575,439,444.22
  5. Step 5: Solve for x
    x = 4,268,575,439,444.22/1,787,745.80
  6. Step 6: Final answer
    x = 2,387,685.90

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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.