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Finding the Fourth Proportional to 528.30, 792.69 and 220.38

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Solution

The fourth proportional to 528.30, 792.69 and 220.38 is: 330.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.30 : 792.69 = 220.38 : x
  2. Step 2: Convert to fraction form
    528.30/792.69 = 220.38/x
  3. Step 3: Cross multiply
    528.30x = 792.69 × 220.38
  4. Step 4: Simplify right side
    528.30x = 174,693.02
  5. Step 5: Solve for x
    x = 174,693.02/528.30
  6. Step 6: Final answer
    x = 330.67

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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.