Home / 2,150.13-3,225.20-689.28

Finding the Fourth Proportional to 2,150.13, 3,225.20 and 689.28

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Solution

The fourth proportional to 2,150.13, 3,225.20 and 689.28 is: 1,033.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,150.13 : 3,225.20 = 689.28 : x
  2. Step 2: Convert to fraction form
    2,150.13/3,225.20 = 689.28/x
  3. Step 3: Cross multiply
    2,150.13x = 3,225.20 × 689.28
  4. Step 4: Simplify right side
    2,150.13x = 2,223,062.41
  5. Step 5: Solve for x
    x = 2,223,062.41/2,150.13
  6. Step 6: Final answer
    x = 1,033.92

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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.