Home / 1,281.10-1,922.10-550.90

Finding the Fourth Proportional to 1,281.10, 1,922.10 and 550.90

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Solution

The fourth proportional to 1,281.10, 1,922.10 and 550.90 is: 826.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.10 : 1,922.10 = 550.90 : x
  2. Step 2: Convert to fraction form
    1,281.10/1,922.10 = 550.90/x
  3. Step 3: Cross multiply
    1,281.10x = 1,922.10 × 550.90
  4. Step 4: Simplify right side
    1,281.10x = 1,058,884.89
  5. Step 5: Solve for x
    x = 1,058,884.89/1,281.10
  6. Step 6: Final answer
    x = 826.54

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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.