Home / 2,145.39-2,960.64-1,261.05

Finding the Fourth Proportional to 2,145.39, 2,960.64 and 1,261.05

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Solution

The fourth proportional to 2,145.39, 2,960.64 and 1,261.05 is: 1,740.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.39 : 2,960.64 = 1,261.05 : x
  2. Step 2: Convert to fraction form
    2,145.39/2,960.64 = 1,261.05/x
  3. Step 3: Cross multiply
    2,145.39x = 2,960.64 × 1,261.05
  4. Step 4: Simplify right side
    2,145.39x = 3,733,515.07
  5. Step 5: Solve for x
    x = 3,733,515.07/2,145.39
  6. Step 6: Final answer
    x = 1,740.25

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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.