Home / 1,145.35-1,718.30-323.61

Finding the Fourth Proportional to 1,145.35, 1,718.30 and 323.61

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Solution

The fourth proportional to 1,145.35, 1,718.30 and 323.61 is: 485.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.35 : 1,718.30 = 323.61 : x
  2. Step 2: Convert to fraction form
    1,145.35/1,718.30 = 323.61/x
  3. Step 3: Cross multiply
    1,145.35x = 1,718.30 × 323.61
  4. Step 4: Simplify right side
    1,145.35x = 556,059.06
  5. Step 5: Solve for x
    x = 556,059.06/1,145.35
  6. Step 6: Final answer
    x = 485.49

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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.