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Finding the Fourth Proportional to 540,010.20, 809,043.30 and 428,424.60

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Solution

The fourth proportional to 540,010.20, 809,043.30 and 428,424.60 is: 641,865.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,010.20 : 809,043.30 = 428,424.60 : x
  2. Step 2: Convert to fraction form
    540,010.20/809,043.30 = 428,424.60/x
  3. Step 3: Cross multiply
    540,010.20x = 809,043.30 × 428,424.60
  4. Step 4: Simplify right side
    540,010.20x = 346,614,052,185.18
  5. Step 5: Solve for x
    x = 346,614,052,185.18/540,010.20
  6. Step 6: Final answer
    x = 641,865.75

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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.