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Finding the Fourth Proportional to 259,286.80, 388,930.20 and 243,540.40

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Solution

The fourth proportional to 259,286.80, 388,930.20 and 243,540.40 is: 365,310.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,286.80 : 388,930.20 = 243,540.40 : x
  2. Step 2: Convert to fraction form
    259,286.80/388,930.20 = 243,540.40/x
  3. Step 3: Cross multiply
    259,286.80x = 388,930.20 × 243,540.40
  4. Step 4: Simplify right side
    259,286.80x = 94,720,216,480.08
  5. Step 5: Solve for x
    x = 94,720,216,480.08/259,286.80
  6. Step 6: Final answer
    x = 365,310.60

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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.