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Finding the Fourth Proportional to 228,379.38, 315,164.16 and 126,411.86

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Solution

The fourth proportional to 228,379.38, 315,164.16 and 126,411.86 is: 174,448.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,379.38 : 315,164.16 = 126,411.86 : x
  2. Step 2: Convert to fraction form
    228,379.38/315,164.16 = 126,411.86/x
  3. Step 3: Cross multiply
    228,379.38x = 315,164.16 × 126,411.86
  4. Step 4: Simplify right side
    228,379.38x = 39,840,487,670.94
  5. Step 5: Solve for x
    x = 39,840,487,670.94/228,379.38
  6. Step 6: Final answer
    x = 174,448.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.