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Finding the Fourth Proportional to 491,674.20, 736,992.90 and 280,858.20

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Solution

The fourth proportional to 491,674.20, 736,992.90 and 280,858.20 is: 420,991.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,674.20 : 736,992.90 = 280,858.20 : x
  2. Step 2: Convert to fraction form
    491,674.20/736,992.90 = 280,858.20/x
  3. Step 3: Cross multiply
    491,674.20x = 736,992.90 × 280,858.20
  4. Step 4: Simplify right side
    491,674.20x = 206,990,499,306.78
  5. Step 5: Solve for x
    x = 206,990,499,306.78/491,674.20
  6. Step 6: Final answer
    x = 420,991.18

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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.