Home / 2,153.94-3,226.68-1,421.28

Finding the Fourth Proportional to 2,153.94, 3,226.68 and 1,421.28

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Solution

The fourth proportional to 2,153.94, 3,226.68 and 1,421.28 is: 2,129.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.94 : 3,226.68 = 1,421.28 : x
  2. Step 2: Convert to fraction form
    2,153.94/3,226.68 = 1,421.28/x
  3. Step 3: Cross multiply
    2,153.94x = 3,226.68 × 1,421.28
  4. Step 4: Simplify right side
    2,153.94x = 4,586,015.75
  5. Step 5: Solve for x
    x = 4,586,015.75/2,153.94
  6. Step 6: Final answer
    x = 2,129.13

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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.