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Finding the Fourth Proportional to 423,039.54, 634,243.69 and 254,520.38

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Solution

The fourth proportional to 423,039.54, 634,243.69 and 254,520.38 is: 381,590.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,039.54 : 634,243.69 = 254,520.38 : x
  2. Step 2: Convert to fraction form
    423,039.54/634,243.69 = 254,520.38/x
  3. Step 3: Cross multiply
    423,039.54x = 634,243.69 × 254,520.38
  4. Step 4: Simplify right side
    423,039.54x = 161,427,944,991.40
  5. Step 5: Solve for x
    x = 161,427,944,991.40/423,039.54
  6. Step 6: Final answer
    x = 381,590.68

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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.