Home / 2,187.40-3,274.70-1,931.40

Finding the Fourth Proportional to 2,187.40, 3,274.70 and 1,931.40

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Solution

The fourth proportional to 2,187.40, 3,274.70 and 1,931.40 is: 2,891.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.40 : 3,274.70 = 1,931.40 : x
  2. Step 2: Convert to fraction form
    2,187.40/3,274.70 = 1,931.40/x
  3. Step 3: Cross multiply
    2,187.40x = 3,274.70 × 1,931.40
  4. Step 4: Simplify right side
    2,187.40x = 6,324,755.58
  5. Step 5: Solve for x
    x = 6,324,755.58/2,187.40
  6. Step 6: Final answer
    x = 2,891.45

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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.