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Finding the Fourth Proportional to 399,477.15, 599,218.02 and 133,236.90

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Solution

The fourth proportional to 399,477.15, 599,218.02 and 133,236.90 is: 199,856.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,477.15 : 599,218.02 = 133,236.90 : x
  2. Step 2: Convert to fraction form
    399,477.15/599,218.02 = 133,236.90/x
  3. Step 3: Cross multiply
    399,477.15x = 599,218.02 × 133,236.90
  4. Step 4: Simplify right side
    399,477.15x = 79,837,951,408.94
  5. Step 5: Solve for x
    x = 79,837,951,408.94/399,477.15
  6. Step 6: Final answer
    x = 199,856.12

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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.