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Finding the Fourth Proportional to 326.36, 488.68 and 285.04

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Solution

The fourth proportional to 326.36, 488.68 and 285.04 is: 426.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.36 : 488.68 = 285.04 : x
  2. Step 2: Convert to fraction form
    326.36/488.68 = 285.04/x
  3. Step 3: Cross multiply
    326.36x = 488.68 × 285.04
  4. Step 4: Simplify right side
    326.36x = 139,293.35
  5. Step 5: Solve for x
    x = 139,293.35/326.36
  6. Step 6: Final answer
    x = 426.81

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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.