Home / 2,581.84-3,872.94-1,121.08

Finding the Fourth Proportional to 2,581.84, 3,872.94 and 1,121.08

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Solution

The fourth proportional to 2,581.84, 3,872.94 and 1,121.08 is: 1,681.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.84 : 3,872.94 = 1,121.08 : x
  2. Step 2: Convert to fraction form
    2,581.84/3,872.94 = 1,121.08/x
  3. Step 3: Cross multiply
    2,581.84x = 3,872.94 × 1,121.08
  4. Step 4: Simplify right side
    2,581.84x = 4,341,875.58
  5. Step 5: Solve for x
    x = 4,341,875.58/2,581.84
  6. Step 6: Final answer
    x = 1,681.70

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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.