Home / 2,130.57-3,195.90-669.72

Finding the Fourth Proportional to 2,130.57, 3,195.90 and 669.72

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Solution

The fourth proportional to 2,130.57, 3,195.90 and 669.72 is: 1,004.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.57 : 3,195.90 = 669.72 : x
  2. Step 2: Convert to fraction form
    2,130.57/3,195.90 = 669.72/x
  3. Step 3: Cross multiply
    2,130.57x = 3,195.90 × 669.72
  4. Step 4: Simplify right side
    2,130.57x = 2,140,358.15
  5. Step 5: Solve for x
    x = 2,140,358.15/2,130.57
  6. Step 6: Final answer
    x = 1,004.59

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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.