Home / 2,585.13-3,878.30-853.75

Finding the Fourth Proportional to 2,585.13, 3,878.30 and 853.75

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Solution

The fourth proportional to 2,585.13, 3,878.30 and 853.75 is: 1,280.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,585.13 : 3,878.30 = 853.75 : x
  2. Step 2: Convert to fraction form
    2,585.13/3,878.30 = 853.75/x
  3. Step 3: Cross multiply
    2,585.13x = 3,878.30 × 853.75
  4. Step 4: Simplify right side
    2,585.13x = 3,311,098.63
  5. Step 5: Solve for x
    x = 3,311,098.63/2,585.13
  6. Step 6: Final answer
    x = 1,280.82

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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.