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Finding the Fourth Proportional to 323,591.41, 485,354.31 and 86,903.34

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Solution

The fourth proportional to 323,591.41, 485,354.31 and 86,903.34 is: 130,346.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,591.41 : 485,354.31 = 86,903.34 : x
  2. Step 2: Convert to fraction form
    323,591.41/485,354.31 = 86,903.34/x
  3. Step 3: Cross multiply
    323,591.41x = 485,354.31 × 86,903.34
  4. Step 4: Simplify right side
    323,591.41x = 42,178,910,622.40
  5. Step 5: Solve for x
    x = 42,178,910,622.40/323,591.41
  6. Step 6: Final answer
    x = 130,346.20

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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.