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Finding the Fourth Proportional to 323,770.80, 485,656.20 and 272,449.20

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Solution

The fourth proportional to 323,770.80, 485,656.20 and 272,449.20 is: 408,673.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,770.80 : 485,656.20 = 272,449.20 : x
  2. Step 2: Convert to fraction form
    323,770.80/485,656.20 = 272,449.20/x
  3. Step 3: Cross multiply
    323,770.80x = 485,656.20 × 272,449.20
  4. Step 4: Simplify right side
    323,770.80x = 132,316,643,165.04
  5. Step 5: Solve for x
    x = 132,316,643,165.04/323,770.80
  6. Step 6: Final answer
    x = 408,673.80

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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.