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Finding the Fourth Proportional to 2,717.69, 4,077.14 and 868.68

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Solution

The fourth proportional to 2,717.69, 4,077.14 and 868.68 is: 1,303.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,717.69 : 4,077.14 = 868.68 : x
  2. Step 2: Convert to fraction form
    2,717.69/4,077.14 = 868.68/x
  3. Step 3: Cross multiply
    2,717.69x = 4,077.14 × 868.68
  4. Step 4: Simplify right side
    2,717.69x = 3,541,725.63
  5. Step 5: Solve for x
    x = 3,541,725.63/2,717.69
  6. Step 6: Final answer
    x = 1,303.21

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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.