Home / 2,313.40-3,190.70-1,380.92

Finding the Fourth Proportional to 2,313.40, 3,190.70 and 1,380.92

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Solution

The fourth proportional to 2,313.40, 3,190.70 and 1,380.92 is: 1,904.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.40 : 3,190.70 = 1,380.92 : x
  2. Step 2: Convert to fraction form
    2,313.40/3,190.70 = 1,380.92/x
  3. Step 3: Cross multiply
    2,313.40x = 3,190.70 × 1,380.92
  4. Step 4: Simplify right side
    2,313.40x = 4,406,101.44
  5. Step 5: Solve for x
    x = 4,406,101.44/2,313.40
  6. Step 6: Final answer
    x = 1,904.60

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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.