Home / 2,315.32-3,190.50-1,965.40

Finding the Fourth Proportional to 2,315.32, 3,190.50 and 1,965.40

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Solution

The fourth proportional to 2,315.32, 3,190.50 and 1,965.40 is: 2,708.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.32 : 3,190.50 = 1,965.40 : x
  2. Step 2: Convert to fraction form
    2,315.32/3,190.50 = 1,965.40/x
  3. Step 3: Cross multiply
    2,315.32x = 3,190.50 × 1,965.40
  4. Step 4: Simplify right side
    2,315.32x = 6,270,608.70
  5. Step 5: Solve for x
    x = 6,270,608.70/2,315.32
  6. Step 6: Final answer
    x = 2,708.31

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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.