Home / 2,309.40-3,187.68-1,365.12

Finding the Fourth Proportional to 2,309.40, 3,187.68 and 1,365.12

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Solution

The fourth proportional to 2,309.40, 3,187.68 and 1,365.12 is: 1,884.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.40 : 3,187.68 = 1,365.12 : x
  2. Step 2: Convert to fraction form
    2,309.40/3,187.68 = 1,365.12/x
  3. Step 3: Cross multiply
    2,309.40x = 3,187.68 × 1,365.12
  4. Step 4: Simplify right side
    2,309.40x = 4,351,565.72
  5. Step 5: Solve for x
    x = 4,351,565.72/2,309.40
  6. Step 6: Final answer
    x = 1,884.28

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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.