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Finding the Fourth Proportional to 528.58, 792.69 and 220.45

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Solution

The fourth proportional to 528.58, 792.69 and 220.45 is: 330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.58 : 792.69 = 220.45 : x
  2. Step 2: Convert to fraction form
    528.58/792.69 = 220.45/x
  3. Step 3: Cross multiply
    528.58x = 792.69 × 220.45
  4. Step 4: Simplify right side
    528.58x = 174,748.51
  5. Step 5: Solve for x
    x = 174,748.51/528.58
  6. Step 6: Final answer
    x = 330.60

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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.