Home / 2,155.31-3,230.75-1,228.97

Finding the Fourth Proportional to 2,155.31, 3,230.75 and 1,228.97

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Solution

The fourth proportional to 2,155.31, 3,230.75 and 1,228.97 is: 1,842.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.31 : 3,230.75 = 1,228.97 : x
  2. Step 2: Convert to fraction form
    2,155.31/3,230.75 = 1,228.97/x
  3. Step 3: Cross multiply
    2,155.31x = 3,230.75 × 1,228.97
  4. Step 4: Simplify right side
    2,155.31x = 3,970,472.53
  5. Step 5: Solve for x
    x = 3,970,472.53/2,155.31
  6. Step 6: Final answer
    x = 1,842.19

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1.5x scale

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.