Home / 919,161.86-1,378,779.88-320,183.60

Finding the Fourth Proportional to 919,161.86, 1,378,779.88 and 320,183.60

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Solution

The fourth proportional to 919,161.86, 1,378,779.88 and 320,183.60 is: 480,288.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,161.86 : 1,378,779.88 = 320,183.60 : x
  2. Step 2: Convert to fraction form
    919,161.86/1,378,779.88 = 320,183.60/x
  3. Step 3: Cross multiply
    919,161.86x = 1,378,779.88 × 320,183.60
  4. Step 4: Simplify right side
    919,161.86x = 441,462,705,585.97
  5. Step 5: Solve for x
    x = 441,462,705,585.97/919,161.86
  6. Step 6: Final answer
    x = 480,288.32

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1.5x scale

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.