Home / 428,555.57-642,958.97-191,845.62

Finding the Fourth Proportional to 428,555.57, 642,958.97 and 191,845.62

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Solution

The fourth proportional to 428,555.57, 642,958.97 and 191,845.62 is: 287,824.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,555.57 : 642,958.97 = 191,845.62 : x
  2. Step 2: Convert to fraction form
    428,555.57/642,958.97 = 191,845.62/x
  3. Step 3: Cross multiply
    428,555.57x = 642,958.97 × 191,845.62
  4. Step 4: Simplify right side
    428,555.57x = 123,348,861,274.98
  5. Step 5: Solve for x
    x = 123,348,861,274.98/428,555.57
  6. Step 6: Final answer
    x = 287,824.66

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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.