Home / 2,145.87-2,960.64-1,261.71

Finding the Fourth Proportional to 2,145.87, 2,960.64 and 1,261.71

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Solution

The fourth proportional to 2,145.87, 2,960.64 and 1,261.71 is: 1,740.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.87 : 2,960.64 = 1,261.71 : x
  2. Step 2: Convert to fraction form
    2,145.87/2,960.64 = 1,261.71/x
  3. Step 3: Cross multiply
    2,145.87x = 2,960.64 × 1,261.71
  4. Step 4: Simplify right side
    2,145.87x = 3,735,469.09
  5. Step 5: Solve for x
    x = 3,735,469.09/2,145.87
  6. Step 6: Final answer
    x = 1,740.77

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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.