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Finding the Fourth Proportional to 404,206.80, 605,435.40 and 216,999.60

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Solution

The fourth proportional to 404,206.80, 605,435.40 and 216,999.60 is: 325,029.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,206.80 : 605,435.40 = 216,999.60 : x
  2. Step 2: Convert to fraction form
    404,206.80/605,435.40 = 216,999.60/x
  3. Step 3: Cross multiply
    404,206.80x = 605,435.40 × 216,999.60
  4. Step 4: Simplify right side
    404,206.80x = 131,379,239,625.84
  5. Step 5: Solve for x
    x = 131,379,239,625.84/404,206.80
  6. Step 6: Final answer
    x = 325,029.76

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1.5x scale

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.