Home / 1,145.20-1,717.68-323.56

Finding the Fourth Proportional to 1,145.20, 1,717.68 and 323.56

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Solution

The fourth proportional to 1,145.20, 1,717.68 and 323.56 is: 485.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.20 : 1,717.68 = 323.56 : x
  2. Step 2: Convert to fraction form
    1,145.20/1,717.68 = 323.56/x
  3. Step 3: Cross multiply
    1,145.20x = 1,717.68 × 323.56
  4. Step 4: Simplify right side
    1,145.20x = 555,772.54
  5. Step 5: Solve for x
    x = 555,772.54/1,145.20
  6. Step 6: Final answer
    x = 485.31

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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.