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Finding the Fourth Proportional to 404,228.80, 605,468.40 and 217,021.60

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Solution

The fourth proportional to 404,228.80, 605,468.40 and 217,021.60 is: 325,062.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,228.80 : 605,468.40 = 217,021.60 : x
  2. Step 2: Convert to fraction form
    404,228.80/605,468.40 = 217,021.60/x
  3. Step 3: Cross multiply
    404,228.80x = 605,468.40 × 217,021.60
  4. Step 4: Simplify right side
    404,228.80x = 131,399,720,917.44
  5. Step 5: Solve for x
    x = 131,399,720,917.44/404,228.80
  6. Step 6: Final answer
    x = 325,062.74

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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.