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Finding the Fourth Proportional to 321.30, 483.03 and 284.85

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Solution

The fourth proportional to 321.30, 483.03 and 284.85 is: 428.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.30 : 483.03 = 284.85 : x
  2. Step 2: Convert to fraction form
    321.30/483.03 = 284.85/x
  3. Step 3: Cross multiply
    321.30x = 483.03 × 284.85
  4. Step 4: Simplify right side
    321.30x = 137,591.10
  5. Step 5: Solve for x
    x = 137,591.10/321.30
  6. Step 6: Final answer
    x = 428.23

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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.