Home / 825,621.28-1,238,609.67-256,990.30

Finding the Fourth Proportional to 825,621.28, 1,238,609.67 and 256,990.30

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Solution

The fourth proportional to 825,621.28, 1,238,609.67 and 256,990.30 is: 385,540.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,621.28 : 1,238,609.67 = 256,990.30 : x
  2. Step 2: Convert to fraction form
    825,621.28/1,238,609.67 = 256,990.30/x
  3. Step 3: Cross multiply
    825,621.28x = 1,238,609.67 × 256,990.30
  4. Step 4: Simplify right side
    825,621.28x = 318,310,670,676.20
  5. Step 5: Solve for x
    x = 318,310,670,676.20/825,621.28
  6. Step 6: Final answer
    x = 385,540.78

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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.