Home / 2,081.40-2,868.90-1,687.74

Finding the Fourth Proportional to 2,081.40, 2,868.90 and 1,687.74

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Solution

The fourth proportional to 2,081.40, 2,868.90 and 1,687.74 is: 2,326.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.40 : 2,868.90 = 1,687.74 : x
  2. Step 2: Convert to fraction form
    2,081.40/2,868.90 = 1,687.74/x
  3. Step 3: Cross multiply
    2,081.40x = 2,868.90 × 1,687.74
  4. Step 4: Simplify right side
    2,081.40x = 4,841,957.29
  5. Step 5: Solve for x
    x = 4,841,957.29/2,081.40
  6. Step 6: Final answer
    x = 2,326.30

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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.