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Finding the Fourth Proportional to 1,321,551.10, 1,978,390.05 and 788,797.90

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Solution

The fourth proportional to 1,321,551.10, 1,978,390.05 and 788,797.90 is: 1,180,847.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,551.10 : 1,978,390.05 = 788,797.90 : x
  2. Step 2: Convert to fraction form
    1,321,551.10/1,978,390.05 = 788,797.90/x
  3. Step 3: Cross multiply
    1,321,551.10x = 1,978,390.05 × 788,797.90
  4. Step 4: Simplify right side
    1,321,551.10x = 1,560,549,916,820.90
  5. Step 5: Solve for x
    x = 1,560,549,916,820.90/1,321,551.10
  6. Step 6: Final answer
    x = 1,180,847.20

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.