Home / 4,119.80-6,178.78-1,621.15

Finding the Fourth Proportional to 4,119.80, 6,178.78 and 1,621.15

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Solution

The fourth proportional to 4,119.80, 6,178.78 and 1,621.15 is: 2,431.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,119.80 : 6,178.78 = 1,621.15 : x
  2. Step 2: Convert to fraction form
    4,119.80/6,178.78 = 1,621.15/x
  3. Step 3: Cross multiply
    4,119.80x = 6,178.78 × 1,621.15
  4. Step 4: Simplify right side
    4,119.80x = 10,016,715.78
  5. Step 5: Solve for x
    x = 10,016,715.78/4,119.80
  6. Step 6: Final answer
    x = 2,431.36

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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.