Home / 2,130.80-3,195.08-669.56

Finding the Fourth Proportional to 2,130.80, 3,195.08 and 669.56

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Solution

The fourth proportional to 2,130.80, 3,195.08 and 669.56 is: 1,003.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.80 : 3,195.08 = 669.56 : x
  2. Step 2: Convert to fraction form
    2,130.80/3,195.08 = 669.56/x
  3. Step 3: Cross multiply
    2,130.80x = 3,195.08 × 669.56
  4. Step 4: Simplify right side
    2,130.80x = 2,139,297.76
  5. Step 5: Solve for x
    x = 2,139,297.76/2,130.80
  6. Step 6: Final answer
    x = 1,003.99

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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.