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Finding the Fourth Proportional to 352.78, 528.71 and 190.28

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Solution

The fourth proportional to 352.78, 528.71 and 190.28 is: 285.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.78 : 528.71 = 190.28 : x
  2. Step 2: Convert to fraction form
    352.78/528.71 = 190.28/x
  3. Step 3: Cross multiply
    352.78x = 528.71 × 190.28
  4. Step 4: Simplify right side
    352.78x = 100,602.94
  5. Step 5: Solve for x
    x = 100,602.94/352.78
  6. Step 6: Final answer
    x = 285.17

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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.