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Finding the Fourth Proportional to 323,821.80, 485,732.70 and 264,724.20

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Solution

The fourth proportional to 323,821.80, 485,732.70 and 264,724.20 is: 397,086.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,821.80 : 485,732.70 = 264,724.20 : x
  2. Step 2: Convert to fraction form
    323,821.80/485,732.70 = 264,724.20/x
  3. Step 3: Cross multiply
    323,821.80x = 485,732.70 × 264,724.20
  4. Step 4: Simplify right side
    323,821.80x = 128,585,200,421.34
  5. Step 5: Solve for x
    x = 128,585,200,421.34/323,821.80
  6. Step 6: Final answer
    x = 397,086.30

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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.