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Finding the Fourth Proportional to 415,163.12, 620,469.95 and 303,079.36

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Solution

The fourth proportional to 415,163.12, 620,469.95 and 303,079.36 is: 452,958.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,163.12 : 620,469.95 = 303,079.36 : x
  2. Step 2: Convert to fraction form
    415,163.12/620,469.95 = 303,079.36/x
  3. Step 3: Cross multiply
    415,163.12x = 620,469.95 × 303,079.36
  4. Step 4: Simplify right side
    415,163.12x = 188,051,633,829.84
  5. Step 5: Solve for x
    x = 188,051,633,829.84/415,163.12
  6. Step 6: Final answer
    x = 452,958.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.