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Finding the Fourth Proportional to 2,105.25, 3,158.53 and 873.24

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Solution

The fourth proportional to 2,105.25, 3,158.53 and 873.24 is: 1,310.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.25 : 3,158.53 = 873.24 : x
  2. Step 2: Convert to fraction form
    2,105.25/3,158.53 = 873.24/x
  3. Step 3: Cross multiply
    2,105.25x = 3,158.53 × 873.24
  4. Step 4: Simplify right side
    2,105.25x = 2,758,154.74
  5. Step 5: Solve for x
    x = 2,758,154.74/2,105.25
  6. Step 6: Final answer
    x = 1,310.13

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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.