Home / 2,655-3,981.96-1,355.76

Finding the Fourth Proportional to 2,655, 3,981.96 and 1,355.76

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Solution

The fourth proportional to 2,655, 3,981.96 and 1,355.76 is: 2,033.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655 : 3,981.96 = 1,355.76 : x
  2. Step 2: Convert to fraction form
    2,655/3,981.96 = 1,355.76/x
  3. Step 3: Cross multiply
    2,655x = 3,981.96 × 1,355.76
  4. Step 4: Simplify right side
    2,655x = 5,398,582.09
  5. Step 5: Solve for x
    x = 5,398,582.09/2,655
  6. Step 6: Final answer
    x = 2,033.36

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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.