Home / 1,815.12-2,722.28-719.73

Finding the Fourth Proportional to 1,815.12, 2,722.28 and 719.73

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Solution

The fourth proportional to 1,815.12, 2,722.28 and 719.73 is: 1,079.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.12 : 2,722.28 = 719.73 : x
  2. Step 2: Convert to fraction form
    1,815.12/2,722.28 = 719.73/x
  3. Step 3: Cross multiply
    1,815.12x = 2,722.28 × 719.73
  4. Step 4: Simplify right side
    1,815.12x = 1,959,302.99
  5. Step 5: Solve for x
    x = 1,959,302.99/1,815.12
  6. Step 6: Final answer
    x = 1,079.43

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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.