Home / 2,380.80-3,286.68-1,585.20

Finding the Fourth Proportional to 2,380.80, 3,286.68 and 1,585.20

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Solution

The fourth proportional to 2,380.80, 3,286.68 and 1,585.20 is: 2,188.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.80 : 3,286.68 = 1,585.20 : x
  2. Step 2: Convert to fraction form
    2,380.80/3,286.68 = 1,585.20/x
  3. Step 3: Cross multiply
    2,380.80x = 3,286.68 × 1,585.20
  4. Step 4: Simplify right side
    2,380.80x = 5,210,045.14
  5. Step 5: Solve for x
    x = 5,210,045.14/2,380.80
  6. Step 6: Final answer
    x = 2,188.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.