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Finding the Fourth Proportional to 2,718.63, 4,078.23 and 869.31

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Solution

The fourth proportional to 2,718.63, 4,078.23 and 869.31 is: 1,304.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.63 : 4,078.23 = 869.31 : x
  2. Step 2: Convert to fraction form
    2,718.63/4,078.23 = 869.31/x
  3. Step 3: Cross multiply
    2,718.63x = 4,078.23 × 869.31
  4. Step 4: Simplify right side
    2,718.63x = 3,545,246.12
  5. Step 5: Solve for x
    x = 3,545,246.12/2,718.63
  6. Step 6: Final answer
    x = 1,304.06

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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.