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Finding the Fourth Proportional to 1,372.60, 2,058.30 and 550.60

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Solution

The fourth proportional to 1,372.60, 2,058.30 and 550.60 is: 825.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.60 : 2,058.30 = 550.60 : x
  2. Step 2: Convert to fraction form
    1,372.60/2,058.30 = 550.60/x
  3. Step 3: Cross multiply
    1,372.60x = 2,058.30 × 550.60
  4. Step 4: Simplify right side
    1,372.60x = 1,133,299.98
  5. Step 5: Solve for x
    x = 1,133,299.98/1,372.60
  6. Step 6: Final answer
    x = 825.66

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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.