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Finding the Fourth Proportional to 327,121.40, 490,682.10 and 280,465.40

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Solution

The fourth proportional to 327,121.40, 490,682.10 and 280,465.40 is: 420,698.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,121.40 : 490,682.10 = 280,465.40 : x
  2. Step 2: Convert to fraction form
    327,121.40/490,682.10 = 280,465.40/x
  3. Step 3: Cross multiply
    327,121.40x = 490,682.10 × 280,465.40
  4. Step 4: Simplify right side
    327,121.40x = 137,619,351,449.34
  5. Step 5: Solve for x
    x = 137,619,351,449.34/327,121.40
  6. Step 6: Final answer
    x = 420,698.10

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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.