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Finding the Fourth Proportional to 2,518.21, 3,777.99 and 874.87

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Solution

The fourth proportional to 2,518.21, 3,777.99 and 874.87 is: 1,312.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,518.21 : 3,777.99 = 874.87 : x
  2. Step 2: Convert to fraction form
    2,518.21/3,777.99 = 874.87/x
  3. Step 3: Cross multiply
    2,518.21x = 3,777.99 × 874.87
  4. Step 4: Simplify right side
    2,518.21x = 3,305,250.11
  5. Step 5: Solve for x
    x = 3,305,250.11/2,518.21
  6. Step 6: Final answer
    x = 1,312.54

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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.