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Finding the Fourth Proportional to 2,718.62, 4,076.53 and 1,329.88

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Solution

The fourth proportional to 2,718.62, 4,076.53 and 1,329.88 is: 1,994.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.62 : 4,076.53 = 1,329.88 : x
  2. Step 2: Convert to fraction form
    2,718.62/4,076.53 = 1,329.88/x
  3. Step 3: Cross multiply
    2,718.62x = 4,076.53 × 1,329.88
  4. Step 4: Simplify right side
    2,718.62x = 5,421,295.72
  5. Step 5: Solve for x
    x = 5,421,295.72/2,718.62
  6. Step 6: Final answer
    x = 1,994.14

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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.