Home / 2,309.64-3,187.38-1,261.74

Finding the Fourth Proportional to 2,309.64, 3,187.38 and 1,261.74

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Solution

The fourth proportional to 2,309.64, 3,187.38 and 1,261.74 is: 1,741.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.64 : 3,187.38 = 1,261.74 : x
  2. Step 2: Convert to fraction form
    2,309.64/3,187.38 = 1,261.74/x
  3. Step 3: Cross multiply
    2,309.64x = 3,187.38 × 1,261.74
  4. Step 4: Simplify right side
    2,309.64x = 4,021,644.84
  5. Step 5: Solve for x
    x = 4,021,644.84/2,309.64
  6. Step 6: Final answer
    x = 1,741.24

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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.