Home / 2,156.70-3,233.22-1,278.25

Finding the Fourth Proportional to 2,156.70, 3,233.22 and 1,278.25

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Solution

The fourth proportional to 2,156.70, 3,233.22 and 1,278.25 is: 1,916.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.70 : 3,233.22 = 1,278.25 : x
  2. Step 2: Convert to fraction form
    2,156.70/3,233.22 = 1,278.25/x
  3. Step 3: Cross multiply
    2,156.70x = 3,233.22 × 1,278.25
  4. Step 4: Simplify right side
    2,156.70x = 4,132,863.47
  5. Step 5: Solve for x
    x = 4,132,863.47/2,156.70
  6. Step 6: Final answer
    x = 1,916.29

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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.