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Finding the Fourth Proportional to 1,719.78, 2,372.31 and 1,021.02

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Solution

The fourth proportional to 1,719.78, 2,372.31 and 1,021.02 is: 1,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.78 : 2,372.31 = 1,021.02 : x
  2. Step 2: Convert to fraction form
    1,719.78/2,372.31 = 1,021.02/x
  3. Step 3: Cross multiply
    1,719.78x = 2,372.31 × 1,021.02
  4. Step 4: Simplify right side
    1,719.78x = 2,422,175.96
  5. Step 5: Solve for x
    x = 2,422,175.96/1,719.78
  6. Step 6: Final answer
    x = 1,408.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.