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Finding the Fourth Proportional to 323,998.40, 485,997.60 and 205,317.20

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Solution

The fourth proportional to 323,998.40, 485,997.60 and 205,317.20 is: 307,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,998.40 : 485,997.60 = 205,317.20 : x
  2. Step 2: Convert to fraction form
    323,998.40/485,997.60 = 205,317.20/x
  3. Step 3: Cross multiply
    323,998.40x = 485,997.60 × 205,317.20
  4. Step 4: Simplify right side
    323,998.40x = 99,783,666,438.72
  5. Step 5: Solve for x
    x = 99,783,666,438.72/323,998.40
  6. Step 6: Final answer
    x = 307,975.80

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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.