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Finding the Fourth Proportional to 619,791.21, 930,185.10 and 320,359.53

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Solution

The fourth proportional to 619,791.21, 930,185.10 and 320,359.53 is: 480,796.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,791.21 : 930,185.10 = 320,359.53 : x
  2. Step 2: Convert to fraction form
    619,791.21/930,185.10 = 320,359.53/x
  3. Step 3: Cross multiply
    619,791.21x = 930,185.10 × 320,359.53
  4. Step 4: Simplify right side
    619,791.21x = 297,993,659,847.21
  5. Step 5: Solve for x
    x = 297,993,659,847.21/619,791.21
  6. Step 6: Final answer
    x = 480,796.85

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1.5x scale

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.