Home / 2,309.20-3,186.72-1,261.26

Finding the Fourth Proportional to 2,309.20, 3,186.72 and 1,261.26

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Solution

The fourth proportional to 2,309.20, 3,186.72 and 1,261.26 is: 1,740.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.20 : 3,186.72 = 1,261.26 : x
  2. Step 2: Convert to fraction form
    2,309.20/3,186.72 = 1,261.26/x
  3. Step 3: Cross multiply
    2,309.20x = 3,186.72 × 1,261.26
  4. Step 4: Simplify right side
    2,309.20x = 4,019,282.47
  5. Step 5: Solve for x
    x = 4,019,282.47/2,309.20
  6. Step 6: Final answer
    x = 1,740.55

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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.