Home / 428,326.20-642,489.30-303,910.20

Finding the Fourth Proportional to 428,326.20, 642,489.30 and 303,910.20

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Solution

The fourth proportional to 428,326.20, 642,489.30 and 303,910.20 is: 455,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,326.20 : 642,489.30 = 303,910.20 : x
  2. Step 2: Convert to fraction form
    428,326.20/642,489.30 = 303,910.20/x
  3. Step 3: Cross multiply
    428,326.20x = 642,489.30 × 303,910.20
  4. Step 4: Simplify right side
    428,326.20x = 195,259,051,660.86
  5. Step 5: Solve for x
    x = 195,259,051,660.86/428,326.20
  6. Step 6: Final answer
    x = 455,865.30

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Similar ratio
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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.