Home / 2,130.65-3,196.11-669.86

Finding the Fourth Proportional to 2,130.65, 3,196.11 and 669.86

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Solution

The fourth proportional to 2,130.65, 3,196.11 and 669.86 is: 1,004.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.65 : 3,196.11 = 669.86 : x
  2. Step 2: Convert to fraction form
    2,130.65/3,196.11 = 669.86/x
  3. Step 3: Cross multiply
    2,130.65x = 3,196.11 × 669.86
  4. Step 4: Simplify right side
    2,130.65x = 2,140,930.26
  5. Step 5: Solve for x
    x = 2,140,930.26/2,130.65
  6. Step 6: Final answer
    x = 1,004.83

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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.