Home / 1,109.61-1,664.18-329.40

Finding the Fourth Proportional to 1,109.61, 1,664.18 and 329.40

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Solution

The fourth proportional to 1,109.61, 1,664.18 and 329.40 is: 494.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.61 : 1,664.18 = 329.40 : x
  2. Step 2: Convert to fraction form
    1,109.61/1,664.18 = 329.40/x
  3. Step 3: Cross multiply
    1,109.61x = 1,664.18 × 329.40
  4. Step 4: Simplify right side
    1,109.61x = 548,176.43
  5. Step 5: Solve for x
    x = 548,176.43/1,109.61
  6. Step 6: Final answer
    x = 494.03

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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.