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Finding the Fourth Proportional to 2,717.75, 4,076.64 and 869.06

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Solution

The fourth proportional to 2,717.75, 4,076.64 and 869.06 is: 1,303.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,717.75 : 4,076.64 = 869.06 : x
  2. Step 2: Convert to fraction form
    2,717.75/4,076.64 = 869.06/x
  3. Step 3: Cross multiply
    2,717.75x = 4,076.64 × 869.06
  4. Step 4: Simplify right side
    2,717.75x = 3,542,844.76
  5. Step 5: Solve for x
    x = 3,542,844.76/2,717.75
  6. Step 6: Final answer
    x = 1,303.59

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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.