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Finding the Fourth Proportional to 526.20, 789.41 and 217.99

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Solution

The fourth proportional to 526.20, 789.41 and 217.99 is: 327.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.20 : 789.41 = 217.99 : x
  2. Step 2: Convert to fraction form
    526.20/789.41 = 217.99/x
  3. Step 3: Cross multiply
    526.20x = 789.41 × 217.99
  4. Step 4: Simplify right side
    526.20x = 172,085.02
  5. Step 5: Solve for x
    x = 172,085.02/526.20
  6. Step 6: Final answer
    x = 327.04

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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.