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Finding the Fourth Proportional to 323,998.80, 485,998.20 and 257,076.60

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Solution

The fourth proportional to 323,998.80, 485,998.20 and 257,076.60 is: 385,614.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,998.80 : 485,998.20 = 257,076.60 : x
  2. Step 2: Convert to fraction form
    323,998.80/485,998.20 = 257,076.60/x
  3. Step 3: Cross multiply
    323,998.80x = 485,998.20 × 257,076.60
  4. Step 4: Simplify right side
    323,998.80x = 124,938,764,862.12
  5. Step 5: Solve for x
    x = 124,938,764,862.12/323,998.80
  6. Step 6: Final answer
    x = 385,614.90

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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.