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Finding the Fourth Proportional to 592.20, 817.20 and 330.21

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Solution

The fourth proportional to 592.20, 817.20 and 330.21 is: 455.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    592.20 : 817.20 = 330.21 : x
  2. Step 2: Convert to fraction form
    592.20/817.20 = 330.21/x
  3. Step 3: Cross multiply
    592.20x = 817.20 × 330.21
  4. Step 4: Simplify right side
    592.20x = 269,847.61
  5. Step 5: Solve for x
    x = 269,847.61/592.20
  6. Step 6: Final answer
    x = 455.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.