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Finding the Fourth Proportional to 605,196.80, 908,086.80 and 427,320.80

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Solution

The fourth proportional to 605,196.80, 908,086.80 and 427,320.80 is: 641,187.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,196.80 : 908,086.80 = 427,320.80 : x
  2. Step 2: Convert to fraction form
    605,196.80/908,086.80 = 427,320.80/x
  3. Step 3: Cross multiply
    605,196.80x = 908,086.80 × 427,320.80
  4. Step 4: Simplify right side
    605,196.80x = 388,044,377,845.44
  5. Step 5: Solve for x
    x = 388,044,377,845.44/605,196.80
  6. Step 6: Final answer
    x = 641,187.09

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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.