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Finding the Fourth Proportional to 399,399.90, 599,105.15 and 133,160.50

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Solution

The fourth proportional to 399,399.90, 599,105.15 and 133,160.50 is: 199,742.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,399.90 : 599,105.15 = 133,160.50 : x
  2. Step 2: Convert to fraction form
    399,399.90/599,105.15 = 133,160.50/x
  3. Step 3: Cross multiply
    399,399.90x = 599,105.15 × 133,160.50
  4. Step 4: Simplify right side
    399,399.90x = 79,777,139,163.01
  5. Step 5: Solve for x
    x = 79,777,139,163.01/399,399.90
  6. Step 6: Final answer
    x = 199,742.51

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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.