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Finding the Fourth Proportional to 323,618.34, 485,427.09 and 86,961.03

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Solution

The fourth proportional to 323,618.34, 485,427.09 and 86,961.03 is: 130,441.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,618.34 : 485,427.09 = 86,961.03 : x
  2. Step 2: Convert to fraction form
    323,618.34/485,427.09 = 86,961.03/x
  3. Step 3: Cross multiply
    323,618.34x = 485,427.09 × 86,961.03
  4. Step 4: Simplify right side
    323,618.34x = 42,213,237,309.17
  5. Step 5: Solve for x
    x = 42,213,237,309.17/323,618.34
  6. Step 6: Final answer
    x = 130,441.42

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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.