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Finding the Fourth Proportional to 2,679.49, 4,018.81 and 731.84

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Solution

The fourth proportional to 2,679.49, 4,018.81 and 731.84 is: 1,097.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.49 : 4,018.81 = 731.84 : x
  2. Step 2: Convert to fraction form
    2,679.49/4,018.81 = 731.84/x
  3. Step 3: Cross multiply
    2,679.49x = 4,018.81 × 731.84
  4. Step 4: Simplify right side
    2,679.49x = 2,941,125.91
  5. Step 5: Solve for x
    x = 2,941,125.91/2,679.49
  6. Step 6: Final answer
    x = 1,097.64

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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.