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Finding the Fourth Proportional to 528.06, 791.79 and 239.22

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Solution

The fourth proportional to 528.06, 791.79 and 239.22 is: 358.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.06 : 791.79 = 239.22 : x
  2. Step 2: Convert to fraction form
    528.06/791.79 = 239.22/x
  3. Step 3: Cross multiply
    528.06x = 791.79 × 239.22
  4. Step 4: Simplify right side
    528.06x = 189,412.00
  5. Step 5: Solve for x
    x = 189,412.00/528.06
  6. Step 6: Final answer
    x = 358.69

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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.