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Finding the Fourth Proportional to 2,679.16, 4,018.74 and 731.42

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Solution

The fourth proportional to 2,679.16, 4,018.74 and 731.42 is: 1,097.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.16 : 4,018.74 = 731.42 : x
  2. Step 2: Convert to fraction form
    2,679.16/4,018.74 = 731.42/x
  3. Step 3: Cross multiply
    2,679.16x = 4,018.74 × 731.42
  4. Step 4: Simplify right side
    2,679.16x = 2,939,366.72
  5. Step 5: Solve for x
    x = 2,939,366.72/2,679.16
  6. Step 6: Final answer
    x = 1,097.12

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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.