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Finding the Fourth Proportional to 323,418.40, 485,127.60 and 270,930.40

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Solution

The fourth proportional to 323,418.40, 485,127.60 and 270,930.40 is: 406,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,418.40 : 485,127.60 = 270,930.40 : x
  2. Step 2: Convert to fraction form
    323,418.40/485,127.60 = 270,930.40/x
  3. Step 3: Cross multiply
    323,418.40x = 485,127.60 × 270,930.40
  4. Step 4: Simplify right side
    323,418.40x = 131,435,814,719.04
  5. Step 5: Solve for x
    x = 131,435,814,719.04/323,418.40
  6. Step 6: Final answer
    x = 406,395.60

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1.5x scale

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.