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Finding the Fourth Proportional to 422,516.55, 633,878.71 and 122,999.77

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Solution

The fourth proportional to 422,516.55, 633,878.71 and 122,999.77 is: 184,529.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,516.55 : 633,878.71 = 122,999.77 : x
  2. Step 2: Convert to fraction form
    422,516.55/633,878.71 = 122,999.77/x
  3. Step 3: Cross multiply
    422,516.55x = 633,878.71 × 122,999.77
  4. Step 4: Simplify right side
    422,516.55x = 77,966,933,149.05
  5. Step 5: Solve for x
    x = 77,966,933,149.05/422,516.55
  6. Step 6: Final answer
    x = 184,529.89

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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.