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Finding the Fourth Proportional to 327,089.40, 490,634.10 and 280,433.40

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Solution

The fourth proportional to 327,089.40, 490,634.10 and 280,433.40 is: 420,650.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,089.40 : 490,634.10 = 280,433.40 : x
  2. Step 2: Convert to fraction form
    327,089.40/490,634.10 = 280,433.40/x
  3. Step 3: Cross multiply
    327,089.40x = 490,634.10 × 280,433.40
  4. Step 4: Simplify right side
    327,089.40x = 137,590,188,818.94
  5. Step 5: Solve for x
    x = 137,590,188,818.94/327,089.40
  6. Step 6: Final answer
    x = 420,650.10

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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.