Home / 2,151.44-3,228.39-918.71

Finding the Fourth Proportional to 2,151.44, 3,228.39 and 918.71

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Solution

The fourth proportional to 2,151.44, 3,228.39 and 918.71 is: 1,378.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.44 : 3,228.39 = 918.71 : x
  2. Step 2: Convert to fraction form
    2,151.44/3,228.39 = 918.71/x
  3. Step 3: Cross multiply
    2,151.44x = 3,228.39 × 918.71
  4. Step 4: Simplify right side
    2,151.44x = 2,965,938.03
  5. Step 5: Solve for x
    x = 2,965,938.03/2,151.44
  6. Step 6: Final answer
    x = 1,378.59

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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.