Home / 428,724.56-591,655.56-321,104.72

Finding the Fourth Proportional to 428,724.56, 591,655.56 and 321,104.72

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Solution

The fourth proportional to 428,724.56, 591,655.56 and 321,104.72 is: 443,136.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,724.56 : 591,655.56 = 321,104.72 : x
  2. Step 2: Convert to fraction form
    428,724.56/591,655.56 = 321,104.72/x
  3. Step 3: Cross multiply
    428,724.56x = 591,655.56 × 321,104.72
  4. Step 4: Simplify right side
    428,724.56x = 189,983,392,930.24
  5. Step 5: Solve for x
    x = 189,983,392,930.24/428,724.56
  6. Step 6: Final answer
    x = 443,136.25

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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.