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Finding the Fourth Proportional to 2,719, 4,078.54 and 667

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Solution

The fourth proportional to 2,719, 4,078.54 and 667 is: 1,000.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,719 : 4,078.54 = 667 : x
  2. Step 2: Convert to fraction form
    2,719/4,078.54 = 667/x
  3. Step 3: Cross multiply
    2,719x = 4,078.54 × 667
  4. Step 4: Simplify right side
    2,719x = 2,720,386.18
  5. Step 5: Solve for x
    x = 2,720,386.18/2,719
  6. Step 6: Final answer
    x = 1,000.51

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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.