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Finding the Fourth Proportional to 255.59, 352.39 and 172.64

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Solution

The fourth proportional to 255.59, 352.39 and 172.64 is: 238.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.59 : 352.39 = 172.64 : x
  2. Step 2: Convert to fraction form
    255.59/352.39 = 172.64/x
  3. Step 3: Cross multiply
    255.59x = 352.39 × 172.64
  4. Step 4: Simplify right side
    255.59x = 60,836.61
  5. Step 5: Solve for x
    x = 60,836.61/255.59
  6. Step 6: Final answer
    x = 238.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.