Home / 428,945.04-642,999.18-204,245.10

Finding the Fourth Proportional to 428,945.04, 642,999.18 and 204,245.10

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Solution

The fourth proportional to 428,945.04, 642,999.18 and 204,245.10 is: 306,168.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,945.04 : 642,999.18 = 204,245.10 : x
  2. Step 2: Convert to fraction form
    428,945.04/642,999.18 = 204,245.10/x
  3. Step 3: Cross multiply
    428,945.04x = 642,999.18 × 204,245.10
  4. Step 4: Simplify right side
    428,945.04x = 131,329,431,819.02
  5. Step 5: Solve for x
    x = 131,329,431,819.02/428,945.04
  6. Step 6: Final answer
    x = 306,168.44

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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.