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Finding the Fourth Proportional to 323,427.20, 485,140.80 and 205,329.20

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Solution

The fourth proportional to 323,427.20, 485,140.80 and 205,329.20 is: 307,993.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,427.20 : 485,140.80 = 205,329.20 : x
  2. Step 2: Convert to fraction form
    323,427.20/485,140.80 = 205,329.20/x
  3. Step 3: Cross multiply
    323,427.20x = 485,140.80 × 205,329.20
  4. Step 4: Simplify right side
    323,427.20x = 99,613,572,351.36
  5. Step 5: Solve for x
    x = 99,613,572,351.36/323,427.20
  6. Step 6: Final answer
    x = 307,993.80

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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.