Home / 2,143.03-3,217.70-1,318.90

Finding the Fourth Proportional to 2,143.03, 3,217.70 and 1,318.90

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Solution

The fourth proportional to 2,143.03, 3,217.70 and 1,318.90 is: 1,980.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.03 : 3,217.70 = 1,318.90 : x
  2. Step 2: Convert to fraction form
    2,143.03/3,217.70 = 1,318.90/x
  3. Step 3: Cross multiply
    2,143.03x = 3,217.70 × 1,318.90
  4. Step 4: Simplify right side
    2,143.03x = 4,243,824.53
  5. Step 5: Solve for x
    x = 4,243,824.53/2,143.03
  6. Step 6: Final answer
    x = 1,980.29

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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.