Home / 2,309.79-3,187.53-1,261.92

Finding the Fourth Proportional to 2,309.79, 3,187.53 and 1,261.92

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Solution

The fourth proportional to 2,309.79, 3,187.53 and 1,261.92 is: 1,741.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.79 : 3,187.53 = 1,261.92 : x
  2. Step 2: Convert to fraction form
    2,309.79/3,187.53 = 1,261.92/x
  3. Step 3: Cross multiply
    2,309.79x = 3,187.53 × 1,261.92
  4. Step 4: Simplify right side
    2,309.79x = 4,022,407.86
  5. Step 5: Solve for x
    x = 4,022,407.86/2,309.79
  6. Step 6: Final answer
    x = 1,741.46

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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.