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Finding the Fourth Proportional to 1,719.62, 2,579.46 and 679.38

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Solution

The fourth proportional to 1,719.62, 2,579.46 and 679.38 is: 1,019.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.62 : 2,579.46 = 679.38 : x
  2. Step 2: Convert to fraction form
    1,719.62/2,579.46 = 679.38/x
  3. Step 3: Cross multiply
    1,719.62x = 2,579.46 × 679.38
  4. Step 4: Simplify right side
    1,719.62x = 1,752,433.53
  5. Step 5: Solve for x
    x = 1,752,433.53/1,719.62
  6. Step 6: Final answer
    x = 1,019.08

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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.