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Finding the Fourth Proportional to 323,539.60, 485,309.40 and 229,061.20

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Solution

The fourth proportional to 323,539.60, 485,309.40 and 229,061.20 is: 343,591.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,539.60 : 485,309.40 = 229,061.20 : x
  2. Step 2: Convert to fraction form
    323,539.60/485,309.40 = 229,061.20/x
  3. Step 3: Cross multiply
    323,539.60x = 485,309.40 × 229,061.20
  4. Step 4: Simplify right side
    323,539.60x = 111,165,553,535.28
  5. Step 5: Solve for x
    x = 111,165,553,535.28/323,539.60
  6. Step 6: Final answer
    x = 343,591.80

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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.