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Finding the Fourth Proportional to 639,791.60, 959,117.04 and 324,086

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Solution

The fourth proportional to 639,791.60, 959,117.04 and 324,086 is: 485,840.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,791.60 : 959,117.04 = 324,086 : x
  2. Step 2: Convert to fraction form
    639,791.60/959,117.04 = 324,086/x
  3. Step 3: Cross multiply
    639,791.60x = 959,117.04 × 324,086
  4. Step 4: Simplify right side
    639,791.60x = 310,836,405,025.44
  5. Step 5: Solve for x
    x = 310,836,405,025.44/639,791.60
  6. Step 6: Final answer
    x = 485,840.08

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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.