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Finding the Fourth Proportional to 352.68, 528.90 and 121.51

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Solution

The fourth proportional to 352.68, 528.90 and 121.51 is: 182.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.68 : 528.90 = 121.51 : x
  2. Step 2: Convert to fraction form
    352.68/528.90 = 121.51/x
  3. Step 3: Cross multiply
    352.68x = 528.90 × 121.51
  4. Step 4: Simplify right side
    352.68x = 64,268.61
  5. Step 5: Solve for x
    x = 64,268.61/352.68
  6. Step 6: Final answer
    x = 182.23

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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.