Home / 1,089.20-1,633.25-358.65

Finding the Fourth Proportional to 1,089.20, 1,633.25 and 358.65

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Solution

The fourth proportional to 1,089.20, 1,633.25 and 358.65 is: 537.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.20 : 1,633.25 = 358.65 : x
  2. Step 2: Convert to fraction form
    1,089.20/1,633.25 = 358.65/x
  3. Step 3: Cross multiply
    1,089.20x = 1,633.25 × 358.65
  4. Step 4: Simplify right side
    1,089.20x = 585,765.11
  5. Step 5: Solve for x
    x = 585,765.11/1,089.20
  6. Step 6: Final answer
    x = 537.79

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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.