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Finding the Fourth Proportional to 415,797.20, 622,774.20 and 321,998.80

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Solution

The fourth proportional to 415,797.20, 622,774.20 and 321,998.80 is: 482,284.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,797.20 : 622,774.20 = 321,998.80 : x
  2. Step 2: Convert to fraction form
    415,797.20/622,774.20 = 321,998.80/x
  3. Step 3: Cross multiply
    415,797.20x = 622,774.20 × 321,998.80
  4. Step 4: Simplify right side
    415,797.20x = 200,532,545,070.96
  5. Step 5: Solve for x
    x = 200,532,545,070.96/415,797.20
  6. Step 6: Final answer
    x = 482,284.50

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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.