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Finding the Fourth Proportional to 288,379.89, 397,961.91 and 159,318.27

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Solution

The fourth proportional to 288,379.89, 397,961.91 and 159,318.27 is: 219,857.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,379.89 : 397,961.91 = 159,318.27 : x
  2. Step 2: Convert to fraction form
    288,379.89/397,961.91 = 159,318.27/x
  3. Step 3: Cross multiply
    288,379.89x = 397,961.91 × 159,318.27
  4. Step 4: Simplify right side
    288,379.89x = 63,402,603,027.10
  5. Step 5: Solve for x
    x = 63,402,603,027.10/288,379.89
  6. Step 6: Final answer
    x = 219,857.92

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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.