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Finding the Fourth Proportional to 352.39, 528.00 and 121.15

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Solution

The fourth proportional to 352.39, 528.00 and 121.15 is: 181.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.39 : 528.00 = 121.15 : x
  2. Step 2: Convert to fraction form
    352.39/528.00 = 121.15/x
  3. Step 3: Cross multiply
    352.39x = 528.00 × 121.15
  4. Step 4: Simplify right side
    352.39x = 63,966.59
  5. Step 5: Solve for x
    x = 63,966.59/352.39
  6. Step 6: Final answer
    x = 181.52

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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.