Home / 1,282.20-1,923.50-551.80

Finding the Fourth Proportional to 1,282.20, 1,923.50 and 551.80

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Solution

The fourth proportional to 1,282.20, 1,923.50 and 551.80 is: 827.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.20 : 1,923.50 = 551.80 : x
  2. Step 2: Convert to fraction form
    1,282.20/1,923.50 = 551.80/x
  3. Step 3: Cross multiply
    1,282.20x = 1,923.50 × 551.80
  4. Step 4: Simplify right side
    1,282.20x = 1,061,387.30
  5. Step 5: Solve for x
    x = 1,061,387.30/1,282.20
  6. Step 6: Final answer
    x = 827.79

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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.