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Finding the Fourth Proportional to 415,074.60, 622,806.30 and 215,620.20

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Solution

The fourth proportional to 415,074.60, 622,806.30 and 215,620.20 is: 323,531.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,074.60 : 622,806.30 = 215,620.20 : x
  2. Step 2: Convert to fraction form
    415,074.60/622,806.30 = 215,620.20/x
  3. Step 3: Cross multiply
    415,074.60x = 622,806.30 × 215,620.20
  4. Step 4: Simplify right side
    415,074.60x = 134,289,618,967.26
  5. Step 5: Solve for x
    x = 134,289,618,967.26/415,074.60
  6. Step 6: Final answer
    x = 323,531.29

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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.