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Finding the Fourth Proportional to 2,517.62, 3,776.44 and 874.40

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Solution

The fourth proportional to 2,517.62, 3,776.44 and 874.40 is: 1,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,517.62 : 3,776.44 = 874.40 : x
  2. Step 2: Convert to fraction form
    2,517.62/3,776.44 = 874.40/x
  3. Step 3: Cross multiply
    2,517.62x = 3,776.44 × 874.40
  4. Step 4: Simplify right side
    2,517.62x = 3,302,119.14
  5. Step 5: Solve for x
    x = 3,302,119.14/2,517.62
  6. Step 6: Final answer
    x = 1,311.60

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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.