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Finding the Fourth Proportional to 2,512.89, 3,767.75 and 869.56

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Solution

The fourth proportional to 2,512.89, 3,767.75 and 869.56 is: 1,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,512.89 : 3,767.75 = 869.56 : x
  2. Step 2: Convert to fraction form
    2,512.89/3,767.75 = 869.56/x
  3. Step 3: Cross multiply
    2,512.89x = 3,767.75 × 869.56
  4. Step 4: Simplify right side
    2,512.89x = 3,276,288.45
  5. Step 5: Solve for x
    x = 3,276,288.45/2,512.89
  6. Step 6: Final answer
    x = 1,303.80

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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.