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Finding the Fourth Proportional to 422,809.70, 634,147.00 and 123,220.17

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Solution

The fourth proportional to 422,809.70, 634,147.00 and 123,220.17 is: 184,810.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,809.70 : 634,147.00 = 123,220.17 : x
  2. Step 2: Convert to fraction form
    422,809.70/634,147.00 = 123,220.17/x
  3. Step 3: Cross multiply
    422,809.70x = 634,147.00 × 123,220.17
  4. Step 4: Simplify right side
    422,809.70x = 78,139,700,836.94
  5. Step 5: Solve for x
    x = 78,139,700,836.94/422,809.70
  6. Step 6: Final answer
    x = 184,810.57

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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.