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Finding the Fourth Proportional to 2,763.08, 4,144.68 and 815.42

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Solution

The fourth proportional to 2,763.08, 4,144.68 and 815.42 is: 1,223.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.08 : 4,144.68 = 815.42 : x
  2. Step 2: Convert to fraction form
    2,763.08/4,144.68 = 815.42/x
  3. Step 3: Cross multiply
    2,763.08x = 4,144.68 × 815.42
  4. Step 4: Simplify right side
    2,763.08x = 3,379,654.97
  5. Step 5: Solve for x
    x = 3,379,654.97/2,763.08
  6. Step 6: Final answer
    x = 1,223.15

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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.