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Finding the Fourth Proportional to 415,186.80, 622,780.20 and 321,874.80

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Solution

The fourth proportional to 415,186.80, 622,780.20 and 321,874.80 is: 482,812.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,186.80 : 622,780.20 = 321,874.80 : x
  2. Step 2: Convert to fraction form
    415,186.80/622,780.20 = 321,874.80/x
  3. Step 3: Cross multiply
    415,186.80x = 622,780.20 × 321,874.80
  4. Step 4: Simplify right side
    415,186.80x = 200,457,252,318.96
  5. Step 5: Solve for x
    x = 200,457,252,318.96/415,186.80
  6. Step 6: Final answer
    x = 482,812.20

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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.