Home / 2,309.58-3,187.44-1,261.80

Finding the Fourth Proportional to 2,309.58, 3,187.44 and 1,261.80

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Solution

The fourth proportional to 2,309.58, 3,187.44 and 1,261.80 is: 1,741.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.58 : 3,187.44 = 1,261.80 : x
  2. Step 2: Convert to fraction form
    2,309.58/3,187.44 = 1,261.80/x
  3. Step 3: Cross multiply
    2,309.58x = 3,187.44 × 1,261.80
  4. Step 4: Simplify right side
    2,309.58x = 4,021,911.79
  5. Step 5: Solve for x
    x = 4,021,911.79/2,309.58
  6. Step 6: Final answer
    x = 1,741.40

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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.