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Finding the Fourth Proportional to 422,878.01, 634,249.46 and 123,288.51

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Solution

The fourth proportional to 422,878.01, 634,249.46 and 123,288.51 is: 184,913.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,878.01 : 634,249.46 = 123,288.51 : x
  2. Step 2: Convert to fraction form
    422,878.01/634,249.46 = 123,288.51/x
  3. Step 3: Cross multiply
    422,878.01x = 634,249.46 × 123,288.51
  4. Step 4: Simplify right side
    422,878.01x = 78,195,670,275.26
  5. Step 5: Solve for x
    x = 78,195,670,275.26/422,878.01
  6. Step 6: Final answer
    x = 184,913.07

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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.