Home / 825,621.78-1,238,610.42-256,990.80

Finding the Fourth Proportional to 825,621.78, 1,238,610.42 and 256,990.80

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Solution

The fourth proportional to 825,621.78, 1,238,610.42 and 256,990.80 is: 385,541.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,621.78 : 1,238,610.42 = 256,990.80 : x
  2. Step 2: Convert to fraction form
    825,621.78/1,238,610.42 = 256,990.80/x
  3. Step 3: Cross multiply
    825,621.78x = 1,238,610.42 × 256,990.80
  4. Step 4: Simplify right side
    825,621.78x = 318,311,482,724.14
  5. Step 5: Solve for x
    x = 318,311,482,724.14/825,621.78
  6. Step 6: Final answer
    x = 385,541.53

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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.