Home / 2,309.34-3,186.86-1,261.40

Finding the Fourth Proportional to 2,309.34, 3,186.86 and 1,261.40

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Solution

The fourth proportional to 2,309.34, 3,186.86 and 1,261.40 is: 1,740.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.34 : 3,186.86 = 1,261.40 : x
  2. Step 2: Convert to fraction form
    2,309.34/3,186.86 = 1,261.40/x
  3. Step 3: Cross multiply
    2,309.34x = 3,186.86 × 1,261.40
  4. Step 4: Simplify right side
    2,309.34x = 4,019,905.20
  5. Step 5: Solve for x
    x = 4,019,905.20/2,309.34
  6. Step 6: Final answer
    x = 1,740.72

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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.