Home / 2,309.11-3,186.61-1,261.17

Finding the Fourth Proportional to 2,309.11, 3,186.61 and 1,261.17

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Solution

The fourth proportional to 2,309.11, 3,186.61 and 1,261.17 is: 1,740.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.11 : 3,186.61 = 1,261.17 : x
  2. Step 2: Convert to fraction form
    2,309.11/3,186.61 = 1,261.17/x
  3. Step 3: Cross multiply
    2,309.11x = 3,186.61 × 1,261.17
  4. Step 4: Simplify right side
    2,309.11x = 4,018,856.93
  5. Step 5: Solve for x
    x = 4,018,856.93/2,309.11
  6. Step 6: Final answer
    x = 1,740.44

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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.