Home / 428,218.20-641,845.92-203,394.60

Finding the Fourth Proportional to 428,218.20, 641,845.92 and 203,394.60

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Solution

The fourth proportional to 428,218.20, 641,845.92 and 203,394.60 is: 304,863.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,218.20 : 641,845.92 = 203,394.60 : x
  2. Step 2: Convert to fraction form
    428,218.20/641,845.92 = 203,394.60/x
  3. Step 3: Cross multiply
    428,218.20x = 641,845.92 × 203,394.60
  4. Step 4: Simplify right side
    428,218.20x = 130,547,994,160.03
  5. Step 5: Solve for x
    x = 130,547,994,160.03/428,218.20
  6. Step 6: Final answer
    x = 304,863.25

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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.