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Finding the Fourth Proportional to 528.12, 792.24 and 220.12

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Solution

The fourth proportional to 528.12, 792.24 and 220.12 is: 330.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.12 : 792.24 = 220.12 : x
  2. Step 2: Convert to fraction form
    528.12/792.24 = 220.12/x
  3. Step 3: Cross multiply
    528.12x = 792.24 × 220.12
  4. Step 4: Simplify right side
    528.12x = 174,387.87
  5. Step 5: Solve for x
    x = 174,387.87/528.12
  6. Step 6: Final answer
    x = 330.21

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Double scale
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Similar ratio
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1.5x scale

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.