Home / 2,187.40-3,275.58-1,309.36

Finding the Fourth Proportional to 2,187.40, 3,275.58 and 1,309.36

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Solution

The fourth proportional to 2,187.40, 3,275.58 and 1,309.36 is: 1,960.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.40 : 3,275.58 = 1,309.36 : x
  2. Step 2: Convert to fraction form
    2,187.40/3,275.58 = 1,309.36/x
  3. Step 3: Cross multiply
    2,187.40x = 3,275.58 × 1,309.36
  4. Step 4: Simplify right side
    2,187.40x = 4,288,913.43
  5. Step 5: Solve for x
    x = 4,288,913.43/2,187.40
  6. Step 6: Final answer
    x = 1,960.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.