Home / 428,943.32-642,996.52-204,243.40

Finding the Fourth Proportional to 428,943.32, 642,996.52 and 204,243.40

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Solution

The fourth proportional to 428,943.32, 642,996.52 and 204,243.40 is: 306,165.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,943.32 : 642,996.52 = 204,243.40 : x
  2. Step 2: Convert to fraction form
    428,943.32/642,996.52 = 204,243.40/x
  3. Step 3: Cross multiply
    428,943.32x = 642,996.52 × 204,243.40
  4. Step 4: Simplify right side
    428,943.32x = 131,327,795,432.97
  5. Step 5: Solve for x
    x = 131,327,795,432.97/428,943.32
  6. Step 6: Final answer
    x = 306,165.85

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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.