Home / 1,281.48-1,921.80-550.32

Finding the Fourth Proportional to 1,281.48, 1,921.80 and 550.32

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Solution

The fourth proportional to 1,281.48, 1,921.80 and 550.32 is: 825.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.48 : 1,921.80 = 550.32 : x
  2. Step 2: Convert to fraction form
    1,281.48/1,921.80 = 550.32/x
  3. Step 3: Cross multiply
    1,281.48x = 1,921.80 × 550.32
  4. Step 4: Simplify right side
    1,281.48x = 1,057,604.98
  5. Step 5: Solve for x
    x = 1,057,604.98/1,281.48
  6. Step 6: Final answer
    x = 825.30

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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.