Home / 1,318,803.15-1,978,183.26-420,232.77

Finding the Fourth Proportional to 1,318,803.15, 1,978,183.26 and 420,232.77

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Solution

The fourth proportional to 1,318,803.15, 1,978,183.26 and 420,232.77 is: 630,342.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,803.15 : 1,978,183.26 = 420,232.77 : x
  2. Step 2: Convert to fraction form
    1,318,803.15/1,978,183.26 = 420,232.77/x
  3. Step 3: Cross multiply
    1,318,803.15x = 1,978,183.26 × 420,232.77
  4. Step 4: Simplify right side
    1,318,803.15x = 831,297,430,917.43
  5. Step 5: Solve for x
    x = 831,297,430,917.43/1,318,803.15
  6. Step 6: Final answer
    x = 630,342.32

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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.