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Finding the Fourth Proportional to 1,281.56, 1,922.07 and 550.94

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Solution

The fourth proportional to 1,281.56, 1,922.07 and 550.94 is: 826.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.56 : 1,922.07 = 550.94 : x
  2. Step 2: Convert to fraction form
    1,281.56/1,922.07 = 550.94/x
  3. Step 3: Cross multiply
    1,281.56x = 1,922.07 × 550.94
  4. Step 4: Simplify right side
    1,281.56x = 1,058,945.25
  5. Step 5: Solve for x
    x = 1,058,945.25/1,281.56
  6. Step 6: Final answer
    x = 826.29

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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.