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Finding the Fourth Proportional to 343,163.80, 515,336.19 and 328,401.55

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Solution

The fourth proportional to 343,163.80, 515,336.19 and 328,401.55 is: 493,167.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,163.80 : 515,336.19 = 328,401.55 : x
  2. Step 2: Convert to fraction form
    343,163.80/515,336.19 = 328,401.55/x
  3. Step 3: Cross multiply
    343,163.80x = 515,336.19 × 328,401.55
  4. Step 4: Simplify right side
    343,163.80x = 169,237,203,567.09
  5. Step 5: Solve for x
    x = 169,237,203,567.09/343,163.80
  6. Step 6: Final answer
    x = 493,167.41

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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.