Home / 1,372.45-2,058.30-385.21

Finding the Fourth Proportional to 1,372.45, 2,058.30 and 385.21

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Solution

The fourth proportional to 1,372.45, 2,058.30 and 385.21 is: 577.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.45 : 2,058.30 = 385.21 : x
  2. Step 2: Convert to fraction form
    1,372.45/2,058.30 = 385.21/x
  3. Step 3: Cross multiply
    1,372.45x = 2,058.30 × 385.21
  4. Step 4: Simplify right side
    1,372.45x = 792,872.60
  5. Step 5: Solve for x
    x = 792,872.60/1,372.45
  6. Step 6: Final answer
    x = 577.71

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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.