Home / 2,891.32-3,985.58-2,049.40

Finding the Fourth Proportional to 2,891.32, 3,985.58 and 2,049.40

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Solution

The fourth proportional to 2,891.32, 3,985.58 and 2,049.40 is: 2,825.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.32 : 3,985.58 = 2,049.40 : x
  2. Step 2: Convert to fraction form
    2,891.32/3,985.58 = 2,049.40/x
  3. Step 3: Cross multiply
    2,891.32x = 3,985.58 × 2,049.40
  4. Step 4: Simplify right side
    2,891.32x = 8,168,047.65
  5. Step 5: Solve for x
    x = 8,168,047.65/2,891.32
  6. Step 6: Final answer
    x = 2,825.02

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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.