Home / 540,134.20-809,682.90-420,124.60

Finding the Fourth Proportional to 540,134.20, 809,682.90 and 420,124.60

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Solution

The fourth proportional to 540,134.20, 809,682.90 and 420,124.60 is: 629,783.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,134.20 : 809,682.90 = 420,124.60 : x
  2. Step 2: Convert to fraction form
    540,134.20/809,682.90 = 420,124.60/x
  3. Step 3: Cross multiply
    540,134.20x = 809,682.90 × 420,124.60
  4. Step 4: Simplify right side
    540,134.20x = 340,167,704,489.34
  5. Step 5: Solve for x
    x = 340,167,704,489.34/540,134.20
  6. Step 6: Final answer
    x = 629,783.68

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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.