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Finding the Fourth Proportional to 338,381.15, 507,635.81 and 135,992.98

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Solution

The fourth proportional to 338,381.15, 507,635.81 and 135,992.98 is: 204,015.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,381.15 : 507,635.81 = 135,992.98 : x
  2. Step 2: Convert to fraction form
    338,381.15/507,635.81 = 135,992.98/x
  3. Step 3: Cross multiply
    338,381.15x = 507,635.81 × 135,992.98
  4. Step 4: Simplify right side
    338,381.15x = 69,034,904,165.72
  5. Step 5: Solve for x
    x = 69,034,904,165.72/338,381.15
  6. Step 6: Final answer
    x = 204,015.22

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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.