Home / 428,091.20-591,162.96-320,474.40

Finding the Fourth Proportional to 428,091.20, 591,162.96 and 320,474.40

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Solution

The fourth proportional to 428,091.20, 591,162.96 and 320,474.40 is: 442,551.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,091.20 : 591,162.96 = 320,474.40 : x
  2. Step 2: Convert to fraction form
    428,091.20/591,162.96 = 320,474.40/x
  3. Step 3: Cross multiply
    428,091.20x = 591,162.96 × 320,474.40
  4. Step 4: Simplify right side
    428,091.20x = 189,452,594,908.22
  5. Step 5: Solve for x
    x = 189,452,594,908.22/428,091.20
  6. Step 6: Final answer
    x = 442,551.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.