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Finding the Fourth Proportional to 2,679.86, 4,019.25 and 731.81

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Solution

The fourth proportional to 2,679.86, 4,019.25 and 731.81 is: 1,097.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.86 : 4,019.25 = 731.81 : x
  2. Step 2: Convert to fraction form
    2,679.86/4,019.25 = 731.81/x
  3. Step 3: Cross multiply
    2,679.86x = 4,019.25 × 731.81
  4. Step 4: Simplify right side
    2,679.86x = 2,941,327.34
  5. Step 5: Solve for x
    x = 2,941,327.34/2,679.86
  6. Step 6: Final answer
    x = 1,097.57

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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.