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Finding the Fourth Proportional to 528.15, 792.45 and 220.07

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Solution

The fourth proportional to 528.15, 792.45 and 220.07 is: 330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.15 : 792.45 = 220.07 : x
  2. Step 2: Convert to fraction form
    528.15/792.45 = 220.07/x
  3. Step 3: Cross multiply
    528.15x = 792.45 × 220.07
  4. Step 4: Simplify right side
    528.15x = 174,391.07
  5. Step 5: Solve for x
    x = 174,391.07/528.15
  6. Step 6: Final answer
    x = 330.20

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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.