Home / 2,215.81-3,323.17-1,489.78

Finding the Fourth Proportional to 2,215.81, 3,323.17 and 1,489.78

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Solution

The fourth proportional to 2,215.81, 3,323.17 and 1,489.78 is: 2,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.81 : 3,323.17 = 1,489.78 : x
  2. Step 2: Convert to fraction form
    2,215.81/3,323.17 = 1,489.78/x
  3. Step 3: Cross multiply
    2,215.81x = 3,323.17 × 1,489.78
  4. Step 4: Simplify right side
    2,215.81x = 4,950,792.20
  5. Step 5: Solve for x
    x = 4,950,792.20/2,215.81
  6. Step 6: Final answer
    x = 2,234.30

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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.