Home / 2,140.16-3,207.58-1,212.91

Finding the Fourth Proportional to 2,140.16, 3,207.58 and 1,212.91

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Solution

The fourth proportional to 2,140.16, 3,207.58 and 1,212.91 is: 1,817.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.16 : 3,207.58 = 1,212.91 : x
  2. Step 2: Convert to fraction form
    2,140.16/3,207.58 = 1,212.91/x
  3. Step 3: Cross multiply
    2,140.16x = 3,207.58 × 1,212.91
  4. Step 4: Simplify right side
    2,140.16x = 3,890,489.82
  5. Step 5: Solve for x
    x = 3,890,489.82/2,140.16
  6. Step 6: Final answer
    x = 1,817.85

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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.