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Finding the Fourth Proportional to 352, 528.16 and 135.56

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Solution

The fourth proportional to 352, 528.16 and 135.56 is: 203.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    352 : 528.16 = 135.56 : x
  2. Step 2: Convert to fraction form
    352/528.16 = 135.56/x
  3. Step 3: Cross multiply
    352x = 528.16 × 135.56
  4. Step 4: Simplify right side
    352x = 71,597.37
  5. Step 5: Solve for x
    x = 71,597.37/352
  6. Step 6: Final answer
    x = 203.40

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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.